Our Saturday Baby Straw Cups are made out of 100% food grade silicone material. Put our cups in the dishwasher at home or conveniently wipe them off on the go. Our exclusive lid plug means less mess for you with fewer spills and a tighter fit for the straw.  All of our cups are designed to match our bibs! Of course you can always feel safe knowing that all of our products are FDA approved, BPA, PVC, and BPS free. All of our kid straw cup fit six ounces.