The 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. There’s also a hole over the ergonomically positioned carb, and the comfortable silicone mouthpiece forms an ash catching restriction that makes your hits even smoother.