Waste of Money! I set up two chillows for my wife and i and put it under her head on the couch. She enjoyed it at first, until the cap leaked all over her and our couch. She was soaked and so was our furniture. I even made sure the cap was as tight as it could possibly get. A screw cap with a gasket would be a better design, and for my money, it was totally not worth it. Completely useless. Don't bother!