●Material 
Flip-it lid/Cap/Junction： Polypropylene (-20°C~+100°C／-4°F~+212°F) 
Sipper Straw/Silicone Ring/Tube：Silicone (-20°C~+100°C／-4°F~+212°F) 
Tube Bead ： Polypropylene、Stainless Steel (-20°C~+100°C／-4°F~+212°F)
 
Transform your feeding bottle to sippy cup in one second, suitable for all Simba wide-neck feeding bottle.
 
Attention: Tube bead contains stainless steel, please DO NOT put it in the Microwave for heating.