Compatibility and seal Designed to fit 2.28 in wide mouth water bottles. Its construction provides a secure seal, but note that it does not fit every 2.28 in wide mouth bottle for an ideal fit. Safe materials Made from dropproof material and upgraded PP+ material for safety. Suitable for children to drink safely, with reduced risk of taste issues from accidental drops. Improve your hydration Automatic drinking spout with an upgraded soft spout that gently touches your lips. An ergonomic handle allows lifting with three fingers, reducing finger tension during use. Lightweight and portable Push button lid enables onehanded drinking with fluid flow. Opens by pressing a button and features a widemouth spout lid for easy filling. Use scenarios Gym or fitness on the go: onehanded operation keeps your workout uninterrupted while staying hydrated. School, daycare, or home with kids: safe materials and simple operation minimize spills and worry. Outdoor activities and commuting: quick access during hiking, running, or cycling, with secure seal and easy cleaning.