Style outdoorMaterial of silica gelThe capacity of 500 mlColor; Purple， gray， transparent color， blue/ product features:1 bottle of large diameter， pour into the pouring is very convenient2. The control of water flow at the border white lid can be removed by itself， can be put into ice mass of objects， etc3. Using high quality silicon， mouldproof and does not contain BPA， FDA certification4. Soft collapsible， after folding volume can deposit any backpack bag， etc5. Globular shape， folding to also won't leave crease6. Aluminum circular ring7. Can use microwave oven， holding boiling water， can be frozen， apply a dishwasher8. Appearance is stable， will not release harmful chemicals