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grav labs upline hammer bubbler
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Upline Hammer Bubbler

4 Reviews
$ 78.99 $ 49.99
Or 4 interest-free payments of $12.50/month with
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$ 49.99

Product Details:
Product SKU: ME.BB
Authorized retailer of Grav Labs
  • Grav Labs hand pipe
  • clear glass
  • deep bowl
  • fixed downstem
  • scientific glass

Product Description

This hammer bubbler from the Upline section of Grav Labs is a great choice for a daily driver. Made entirely out of clear glass, the Upline Hammer Bubbler has the trademark forced stacked percs that are found in all Upline products. These percs can be found circling the diffused downstem and at the end of the neck towards the mouthpiece. There is an Upline logo brandished on the front of every bubbler. Logo color is chosen at random.

Product Warranty & Certifications

Upline Hammer Bubbler Certificate Icon
Optional Protection Plan Available with Piece Protect.
Learn more.

Product Features

clear glass
This piece features sleek and clean clear glass that allows you to watch this concentrate rig or water pipe function. Clear glass allows you to watch the bubbles stack as your smoke/vapor percolates
deep bowl
This pipe features a deep bowl to allow for a large amount of dry herbs or tobacco to be packed at one time
fixed downstem
The downstem is a glass tube that funnels smoke from the bowl towards the bottom of the bong. This specific type of downstem is fixed into the joint and functions as a perc by distilling smoke with its slits or holes.
scientific glass
Scientific glass means this pipe is made from clear borosilicate glass. It features a “laboratory” design, and usually an overall shape that resembles scientific equipment (glass beaker chambers, straight tubes, etc.)

Customer Reviews & Questions

Customer Reviews
2.8 Based on 4 Reviews
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Filter Reviews:
Nicolas C.
Great piece. Gets dirty a

Great piece. Gets dirty a lil fast, but it is a work of art, nonetheless.


Hey Nicolas, Thank you so much for taking the time to leave this excellent review. We really appreciate your business! -DankStop Support

Cutberto G.
Too Cool

Another solid Grav Lab Upline piece for the collection!

Garrett M.
High Quality Piece But Serious Design and QC Issues

First I'll say that the quality of glass is top-notch. For that reason alone, I'd consider buying more products from Grav. Unfortunately, there are some design and QC issues that make this piece difficult to use, if not unusable. -QC Issue: the top of the bowl is significantly higher on one side than it is on the other. This makes packing a full bowl difficult, as one side is tucked safely inside the glass bowl while the other side of the material is exposed and hangs over the edge. -Design Issue 1: the Upline rings are supposed to help aid diffusion in the chamber, but in my experience the regular Grav bubblers (which don't have the Upline rings) produce much smoother, cooler hits. Also, the downstem on this piece is diffused with two circular holes near the bottom tip of the downstem. The regular Grav bubbler, on the other hand, uses an "X" pattern diffuser on the downstem, which creates much smoother suction in my experience. -Design Issue 2: the Upline rings near the mouthpiece look pretty (and they probably reinforce the glass in that area, too), and they probably do prevent backsplash from happening a little bit. That said, if/when backsplash does occur -- or if you've gotten the rings wet while cleaning the piece -- water gets trapped on the rings and it's nearly impossible to getting all of it out. Since I drain the bubbler and use fresh water every time I smoke a bowl, this means that the fine droplets of water that were stuck on the rings constantly spray into my mouth. Ugh. Overall, I'd recommend Grav labs based on the quality of the piece, the Made in USA designation, and the usability of most of their products. When it comes to this piece, though, I'd highly recommend skipping the Upline bubbler and sticking with their regular line of hammer bubblers. They're far more functional and they cost a fraction of the price.

Josh F.
Up line hammer

Not great. Hole at headpiece too small. Bad flow ....not using it. Would not order again.


Josh, We're sorry to hear that you did not like your item! We're concerned that it could have been defective. Please reach out to our Customer Service staff at support@dankstop.com. Thank you!

Shipping & Returns

Return Policy

DankStop is proud to offer the industry's most customer friendly return policy :) If you are unsatisfied with your purchase for any reason, you may file a return for unused items within 7 days of delivery. Due to legal liability, DankStop does not accept returns on items that have been used. You can contact our support team directly via live-chat, phone, or email at 1-844-DANKSTOP (326-5786) and support@dankstop.com.


View our entire Return Policy

Shipping Info

How much does shipping cost?

DankStop offers free USA shipping on all orders. In addition, you may choose to purchase expedited shipping (2-day, Overnight, etc) at checkout. International customers receive free shipping on orders over $300.

How long does free shipping take?

Free shipping is delivered via USPS or FedEx, and takes anywhere from 3-5 business days.

How long until my order ships?

All orders placed before 2pm EST ship out same day (Mon-Fri). Orders placed after 2pm ship the following business day.

Do you offer discreet packaging?

At DankStop, we completely understand our customers needs for discreet packing. For your privacy, all packages are shipped in unmarked brown or standard USPS Priority boxes with a return address of DS Distribution LLC. There will be no mention of DankStop on your package.

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Our team of "cannaisseurs" personally tests and hand-curates every product featured in our store -- so, no matter what your preference, we the right right bong, pipe, dab rig, and accessories to fit your lifestyle! We're proud of our products, our service, and our prices. If you find a competitor selling one of our products for less, let us know -- we'll beat their price by 5%, guaranteed.