Soft - will not hurt gums
Medical grade SUS316 stainless steel, anti-oxidation better than traditional 304 steel
99 degree hot water.
6 hours later ,the temperature is greater than 60 degrees ;
12 hours later , the temperature is greater than 46 degrees
Accessory "X" type straw
Usually closed. When the baby absorbs water, it will only effluent.
Soft Silicone Straw
Anti-oxidation, high temperature resistance, no BPA