Our silicone straws are nontoxic, flexible, safe for teeth, and compatible with our GoSili straw cup toppers. 100% European-grade silicone. BPA, BPS, phthalate, PVC, and lead free. Dishwasher safe. Straws are 5 1/2", 6 1/2" and 8" in length with an opening of 0.5 cm.