1) Food grade BPA free PP + silicone material, more safety, environmental and healthier. 2) Non-drip patent design, thoroughly leakproof, rollover in 360 degree and no leakage. 3) Bite-resistant silicone straw, it’s soft and elastic, will protect baby’s delicate teeth. 4) Press top lid, easy to use and ensure the straw is clean. When the baby wants to drink water, simply open the lid and drink easily. 5) Break-resistant, make it more safe to use. 6) With strap, it’s portable, particularly suitable for outdoor or short trip. 7) The built-in multi-flow valve in the suction tube is sensitive to pressure and releases liquid according to the baby's sucking. When the suction force is large, the discharge flow is large; when the suction force is small, the discharge flow is small; when it is not suctioned, the flow rate is not released and ensure non-leakage.