Straight Neck Tube

A “fire-cut” downstem features six precise, uniform slits (openings) that allow your smoke to travel through while maxing out contact with water. These slits at the bottom of the downstem break smoke into many tiny bubbles, and this extra contact ensures superior filtration and cooling. The result? Exceptionally smooth, tasty hits with less harshness, even with the direct power of a straight tube.

Traveling with thick glass like this requires care. Clean your bong thoroughly before packing. Remove the downstem and bowl, wrapping each piece separately in bubble wrap. Use a padded bag or hard case to protect the main body. The straight tube design is generally easier to pack than angled pieces, but make sure there’s adequate padding around the entire length to prevent breakage during transport.

For a more detailed guide, check out this blog post with advice on how to travel with a glass bong.

Disassemble the bong by removing the bowl and downstem. Rinse all parts with warm water. Fill the tube with isopropyl alcohol and coarse salt, plug both openings, and shake vigorously. The straight design makes it easy to use long cleaning brushes for thorough scrubbing. Clean the downstem and bowl in separate bags with the same solution. Rinse thoroughly and let all parts air dry. Regular cleaning keeps your hits smooth and your glass sparkling.

Fill the tube so the water sits 1–2 inches above the highest slit on your downstem. This ensures all slits are submerged for maximum diffusion and cooling, but not so high that you risk splashback up the straight neck during powerful draws. The straight design allows for easy monitoring of water levels.

The straight tube design is excellent for stacking ice cubes above the ice catcher, allowing for maximum cooling capacity. You can fill the entire neck section with ice for ultra-chilled hits. As the ice melts, it will raise the water level at the base—start with your usual water level and adjust as needed during longer sessions.

“Bubble magic” refers to the smoke being diffused into tiny bubbles by the 6-slit downstem. More bubbles mean more surface area for the smoke to cool and filter through the water, resulting in smoother, cleaner, and cooler hits every time.

More contact means:

• Better Filtration: More impurities and particulate matter are trapped in the water.
• Superior Cooling: The water absorbs more heat from the smaller bubbles.

The 9MM borosilicate glass makes this bong extremely sturdy and much more resistant to accidental bumps than standard glass. However, no glass is completely indestructible. The lifetime warranty covers manufacturing defects and gives you peace of mind, but reasonable care is still important.

Taller straight tubes (18″–24″) offer longer smoke paths for enhanced cooling and can hold larger volumes of smoke for massive hits—though they require more lung power to clear completely. 

Shorter versions (10″–14″) are easier to handle and clear quickly, delivering more direct and intense hits. The straight design ensures consistent airflow regardless of height, making it easier to gauge your draw and clear the chamber efficiently.

Yes! You can connect your dry herb vaporizer to this bong for even cleaner, tastier hits. Just use the correct size connector and silicone tubing (not included). The straight tube design works excellently with vaporizers for enhanced cooling and filtration. Read this blog post to learn how to connect your DHV to a bong.

Absolutely. This bong is 100% covered by The Kind Pen’s unlimited Lifetime Warranty – we’ve got your back and you can enjoy it with total confidence.