Make cleaning your glass piece fast, easy and hassle-free. Smell proof your pieces. Add Green Piece Cleaner - This cap keeps the liquid from spilling while cleaning. Super Tight Seal with 3 Different Sizes for an easy fit. Awesome psychedelic designs. Make cleaning your glass bottle fast, easy and hassle-free using cleaner + proprietary Plugs and Caps system for the quickest and easiest clean ever. It makes a tight seal, will not leak. Confidently store and clean your pieces. Smell proof your rig