1. Material: silicone
2. The bottom of the cup is thickened steadily, and the lid is anti-fall
3. With a buckle for easy portability
4. The straw is non-toxic, harmless and dust-proof
5. Foldable design, saving half the space when storing
6. 360 degree rotation without leakage
7. Large-diameter design, convenient for water filling
8. Hook handle design, can hang backpack freely
9. Capacity: 550ml before folding, 200ml after folding
10. Size: 18x8.7cm before folding, 10x8.7cm after folding
11. Weight: about 160 grams