Description: 1. Safety lock design: flip the lock up to lock the button to prevent water leakage, and put it in the backpack more comfortably 2. Silicone straw design: food-grade silicone straw material is safe and hygienic, wear-resistant and bite-resistant, no peculiar smell, worry-free baby use 3. No water leaking when placed upside down: the cup body is upside down, shaking and not leaking, you can safely carry it in the bag 4. Exquisite cup lid: the cute bear on the lid is unique, exquisite and cute 5. Double-layer vacuum structure: 304 stainless steel inner tank is not easy to produce dirt and easy to clean. 6. Cup with rope collocation: You can go out like a backpack. The cup is easy to carry when you go out and free your hands.