These heavy-duty 9mm thick Red Eye Glass® water pipes feature a built-in ice catcher and are made of 100% borosilicate glass for best-in-class durability. It's never a bad pick to go a little more thicc. These heavy-duty 9mm thick Red Eye Glass® water pipes feature a built-in ice catcher and are made of 100% borosilicate glass for best-in-class durability. Pick one up and feel the difference.