NS Novelties Firefly Heart Review: Glow-in-the-Dark Glass Dildo Tested

Every now and then, it’s fun to try something a little different from the usual silicone toys. That’s exactly what caught my attention about the NS Novelties Firefly Heart. With its handcrafted glass construction and glow-in-the-dark design, it immediately stands out as one of the more distinctive options in the glass toy category.

In this NS Novelties Firefly Heart review, I’ll take a closer look at its build quality, comfort, design, and real-world performance to see whether it’s more than just an eye-catching novelty and whether it deserves a place in your collection.

This glow-in-the-dark glass dildo is playful, dreamy, and surprisingly functional. It also has a bubbly shape that feels fantastic as the smooth curves create firm, satisfying pressure during vaginal or anal play. So allow me, to put it to a proper test and tell you more about it in this NS Novelties Firefly Heart review.

Quick Verdict

The NS Novelties Firefly Heart is best for beginner to intermediate users who want a playful glow-in-the-dark glass dildo with firm pressure, temperature-play potential and a heart-shaped flared base for vaginal or anal use. Its biggest strengths are the annealed borosilicate glass, 5.2-inch insertable length, 1.34-inch diameter, three bead-like curves, all-lube compatibility and boil-safe non-porous build, while its main drawbacks are the fragile thinner heart base, fading glow effect, no flexibility and no powered features.

• Best for: Users who want a firm glass dildo with visual flair, temperature play and anal-safe base design.
• Skip it if: You want vibration, flexibility, strong girth or a toy that can survive careless drops.
• Main strength: Glow-in-the-dark borosilicate glass with smooth bead-like curves and all-lube compatibility.
• Main drawback: The thinner heart-shaped base is the most fragile part and needs padded storage.
• Final verdict: A fun, affordable and body-safe glass dildo for users who value firmness, glow effects and temperature play over softness or powered stimulation.

NS Novelties Firefly Heart Overview

The Firefly Heart is a handcrafted glass dildo with a flared base, making it suitable for both vaginal and anal use when used appropriately. Its shape is reminiscent of some butt plugs, but the longer shaft and smooth contours make it a versatile toy for a variety of stimulation styles.

For anal use, the flared base provides an important safety feature, while the firm glass construction delivers precise, targeted pressure. It can also be used vaginally, where the rigid shape allows for focused G-spot stimulation. As with any glass toy, it’s best to use plenty of water-based lubricant, insert it gradually, and clean it thoroughly before and after each use.

Now, remember that this is a glass dildo. And you’ll never know how it compares to standard silicone dildos until you try one. While classic dildos are flexible and softer, glass always stays firm. Always. That means it creates a very different kind of internal pressure during vaginal or anal play, with smooth, precise stimulation that can feel much more intense than softer materials. But that’s not all.

Again, the best thing about the NS Novelties Firefly Heart is that it glows in the dark. I hadn’t heard much about NS Novelties before, but they definitely managed to get my attention with that feature. Sure, a glow-in-the-dark effect is not the most important thing when choosing a dildo, but it does make this toy feel playful, unusual, and seriously fun to look at. If you enjoy glass toys, visual play, and firm internal stimulation, the Firefly Heart adds a little extra sparkle to the experience. So how did it feel when I tested it properly? Let’s get into the fun part.

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First Impressions, Shape and Glass Design

The night is dark and full of terrors! But! The Firefly Heart is bright and beautiful and full of hope!

I’m positive that most people will have one of those “awww, it’s so cute” reactions when they see this toy. Seriously, the Firefly Heart looks adorable. The cutest thing about it has got to be the heart-shaped handle, which adds a playful, romantic touch to the whole design. It also makes the toy easier to hold and control during vaginal or anal play, especially if you’re using it with a partner. But let’s get back to business and see how this glow-in-the-dark glass dildo actually performs.

When I first opened this dildo, I was stunned by its unique shape and glossy look. This toy, like most other glass dildos, is made of hand-blown borosilicate glass. It feels silky smooth to the touch. However, it has that extra tough glossy texture that will provide hours and hours of fun. What’s more, this dildo uses annealed glass. Annealing is a process that removes residual stresses in order to make the glass extremely resistant.

Beyond the heart-shaped handle, the Firefly Heart features a wide flared base that enhances both stability and safety. This design makes it suitable for anal use by helping prevent the toy from being inserted too far, while also providing a secure grip during use.

The broad base also improves handling, making the toy easier to control and reposition whether you’re using it vaginally or anally. It’s a practical design element that adds versatility without compromising the elegant look of the toy.

Above the base, the Firefly Heart features a gently curved shaft with three rounded, bead-like contours that add texture without creating sharp transitions. The firm glass construction allows these subtle curves to provide precise, focused stimulation during use.

Another distinctive design element is the decorative air bubbles suspended within the glass. When the toy is exposed to light and then viewed in the dark, these internal details contribute to its glow-in-the-dark effect, giving the Firefly Heart a unique appearance that sets it apart from more traditional glass dildos.

NS Novelties Firefly Heart Features and Specs

• 100% annealed borosilicate glass (non-porous, body-safe, hypoallergenic)
• Heart-shaped handle (doubles as flared anal-safe base)
• Insertable length: 5.2 inches / Insertable width (diameter): 1.34 inches
• Total length: 7.2 inches
• Three bead-like curves along shaft
• Bubble glass detail (glows when charged)
• Glow-in-the-dark: phosphorescent, charges in sunlight or under UV light, glows phosphorescent green in darkness
• Temperature play compatible: heat in warm water or cool in cold water for different sensations
• Compatible with all lube types: water-based, silicone-based and oil-based
• Glass is always firm and non-flexible – applies consistent directional pressure unlike silicone
• Boil-safe for full sterilization
• Around $45 price point
• 1-year warranty with valid receipt
• Discreet shipping (billed as MSNV Inc.)

Borosilicate Glass, Cleaning and Safety

While glass dildos always have a similar toughness to them, they differ based on texture, shape and transparency. In my NS Novelties Firefly Heart review, I was impressed with the quality of the actual glass compared to the price. At around $45, you’ll get a premium-looking glass toy that will literally last forever.

As I said, this thing is made of annealed borosilicate glass, so it feels super durable. I don’t exactly know how they get that glowing effect, but you’ll need to leave your dildo out in the sun to “charge up”. Then, turn off the lights and this little beauty glows with a phosphorescent green color. Plus, all the little bubbles inside it light up, making it look like some unusual celestial object made for playful glass toy adventures.

The glow-in-the-dark effect is a fun visual feature that gives the Firefly Heart its distinctive personality, but the quality of the glass itself is equally impressive. The body-safe, non-porous material is durable, hygienic, and very easy to clean after use with warm water and a suitable toy cleaner or mild soap.

Another advantage of borosilicate glass is its compatibility with temperature play. During testing, I safely warmed and cooled the toy using water to explore different sensations, and the glass retained temperature well without affecting its smooth finish. Combined with its balanced weight and rigid construction, this makes the Firefly Heart a versatile option for users who enjoy precise stimulation and temperature-based play.

Size, Insertable Length and Fit

Every once in a while, I test a 5 or 6-inch toy and start wondering if it will feel too small for me. Yes, I’m used to larger toys, but I always forget that 5 to 6 inches can be more than enough when the shape is done right. When I started my NS Novelties Firefly Heart review, I thought the 5.2 inches of insertable length might feel a bit underwhelming. However, that wasn’t the case at all. Basically, the size is slightly above average, which makes it versatile for vaginal use and experienced anal use. Combined with the swirly shape of the shaft, I’d say this length works well for both beginners and more experienced users.

Plus, the width is around 1.34 inches, which also keeps it in a comfortable, approachable range. Still, it feels fantastic during anal play because the firm glass and curved shape create a very noticeable stretching sensation. I would have preferred a slightly thicker shaft for vaginal use, though. Even so, the three large curves along the shaft introduce some really neat sensations and can feel very intense against the G-spot. Even better, I loved how each curve created that slow, beaded feeling during anal play. Pushing the whole shaft in gradually feels a bit like using a long, smooth set of anal beads, which is definitely part of the Firefly Heart’s playful charm.

On a side note, the heart-shaped base is much thinner than the dildo and I think this is the most vulnerable spot of this toy. It looks like it could crack if you drop it, so I’d advise you to be extra careful here.

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Glow-in-the-Dark Effect and Charging

By far, the glowing effect was the most entertaining aspect of my NS Novelties Firefly Heart review. It made the whole experience feel more intimate, playful, and visually unique. Plus, Richard loved seeing the soft glow during anal play, which added a fun little surprise to the moment. It’s truly something special, and it can bring a different kind of closeness to solo or partnered sessions. Plus, if you enjoy taking tasteful photos or videos with your partner, the glow-in-the-dark effect can look seriously beautiful on camera.

NS Novelties Firefly Heart Compared With Other Glass Dildos

Show More

	NS Novelties Firefly Heart	Glas Sweetheart	Pipedream Icicles No. 5	Fifty Shades of Grey Drive Me Crazy
features	Designed in a playful heart shape, adding a fun and romantic touch to intimate moments The special material glows in the dark, enhancing the visual appeal during nighttime use Works well with both water-based and silicone-based lubricants for enhanced comfort during use Suitable for various types of play, including vaginal and anal use, making it a versatile addition to any toy collection Non-porous material makes it easy to clean with soap and water or a toy cleaner for optimal hygiene	Suitable for vaginal and anal play The glass material allows for temperature play, as it can be heated or cooled for enhanced sensations Made from body-safe, durable borosilicate glass, ensuring safety and longevity for extended use The clear glass design allows for visual appeal and it can also serve as a decorative piece when not in use Made from sustainable materials, making it an environmentally friendly choice for pleasure products	Its elegant appearance allows it to double as a decorative piece when not in use The glass material allows for temperature experimentation, enabling users to heat or cool the toy for varied sensations Easy to clean and sanitize, making it ideal for hygienic use; can be washed with soap and water or a toy cleaner The substantial weight of the glass offers satisfying stimulation and can enhance pleasure during use Features a beautiful and artistic shape that adds a touch of sophistication to intimate play	Part of the official Fifty Shades of Grey collection, making it a great addition for fans of the series Compact and lightweight, making it easy to store and travel with for on-the-go pleasure The curved design fits comfortably in the hand, making it easy to use and control during play Experiment with both sides for progressive play that builds to an intense orgasm Experience different sensations from each end and thrilling stimulation from its orgasmic textures
price	From $62	From $39	From $39.99	From $14.80
users	159	144	103	70
our rating	4.8	4.5	4.3	4
power	None	Hand	Hand	Hand
material	Borosilicate Glass	Borosilicate Glass	Glass	Glass
waterproof	Yes	Yes	Yes	Yes
brand	NS Novelties	Glas	Pipedream	Fifty Shades of Grey
type	Glow-in-the-dark glass dildo	Heart-handle glass dildo	Beaded glass dildo	Curved glass G-spot dildo
allergens	Phthalate-free - Non-porous	Phthalate-free - Non-porous	Latex-Free, Phthalate-Free	Latex-Free, Phthalate-Free
design	4.7	4.6	4.5	4.3
ease of use	4.6	4.7	4.6	4.2
orgasm	4.6	4.5	4.5	4.1
quality	4.9	4.7	4.6	4.2
noise	Whisper Quiet	Whisper Quiet	Whisper Quiet	Whisper Quiet
ease of clean	Easy	Easy	Easy	Easy
warranty	1 year	3 years	90 days	None

NS Novelties Firefly Heart Review: Final Verdict

The NS Novelties Firefly Heart is one of the most genuinely fun glass dildos available at its price point. The glow-in-the-dark effect is the obvious draw, but the borosilicate construction, all-lube compatibility, temperature play capability and three-bead curved shaft make this a capable toy beyond the novelty feature. Handle the heart-shaped base with care. At around $45, it’s exceptional value for a handmade glass dildo.

Who Should Buy the NS Novelties Firefly Heart?

Mistakes to Avoid With the NS Novelties Firefly Heart

1. Charging indoors under artificial light only. The phosphorescent glow is significantly brighter and lasts longer when charged in direct outdoor sunlight. Indoor bulbs can charge it but the effect will be noticeably weaker. Charge outdoors for 20-30 minutes before a session.
2. Using ice directly on the glass for temperature play. Rapid temperature change from ice directly on glass can create uneven stress. Use cold water instead – fill a bowl or run under cold tap for 1-2 minutes for a safe, effective chill.
3. Storing without padding. The heart-shaped base is the thinnest point of the toy and the most vulnerable to impact. Do not store loose in a drawer or bag. Always use a padded pouch or padded case and store away from other toys that could knock against it.
4. Rushing the bead sensation. The three bead-like curves create their best sensation on slow, deliberate withdrawal during anal use. Moving quickly through them loses the sequential sphincter sensation that is the primary textural feature. Take time with the withdrawal pace.
5. Assuming oil-based lube is always fine. Oil-based lube is compatible with glass but NOT with latex condoms or silicone toys used in the same session. If you are combining the Firefly Heart with other materials, confirm lube compatibility across everything in use.

The NS Novelties Firefly Heart Lowdown – What You Need to Know

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