Made For Mom No Spill Bottle Cap System, Red, 3 Piece
No Spill drink any time. 3 wide-mouth bottle caps fit most leading United States brand drink bottles (15.9 ounce or more),(think juices and sports drinks) and turns them into no-spill sippy cups. Patented valve embedded in bottle cap is drip and leak proof. Also included are two adapters to make the bottle caps work with narrow-necked bottles (think water bottles). Two convenient sizes, one with a 'course' thread design and one with a 'fine' thread design, allow you to convert most any narrow-necked bottle with ease. No engineering degree required, a quick glance tells you which fits which.