DH 3 It's cheap and not well constructed. It comes in three parts. 2 pieces of flexible tubing and the glasses which are hard plastic. There are no bands to secure the flexible tubing and glasses. The flexible tubing seems a little too big to securely prevent water leakage at the connection points. If you're drinking water or a clear liquid, it's okay. I probably wouldn't chance a colored liquid, especially if I were wearing clothes I care about.