1. Material: Silicone 2. Good sealing, not easy to leak when inverted 3. Adaptable to most beverage and drinking water bottles 4. Mini size, easy to carry around 5. With its own flip-top dust cap, you can cover the straw after drinking to prevent contamination with dust 6. Detachable top and bottom design, easy to clean 7. Size: about 11.6 x 5.2cm 8. The caliber of the upper part is about 2.8cm, the caliber of the lower part is about 3.5cm
