It's made from 100% BPA-free

8mm joints as well as male and female joints

while the bottom hides a concentrate container

It features a multi-channel airflow path that spirals as it moves through the carb cap

GRAV® Rocker Steamroller with Silicone Skin Silicone Colors:Teal It's made from 100% BPA-freeThe Rocker Steamroller is already virtually unspillable. The Rocker Steamroller with Silicone Skin is virtually unbreakable too. The glass Rocker Steamroller is encased in a protective silicone case that keeps the glass safe from minor falls and bumps from any angle. The silicone is open over the distinctive GRAV logo as well as the raised bowl, so your flame and herb only come into contact with glass. Theres also a hole over the ergonomically