We love stainless steel straws as much as the next person, but we don't love banging them against our teeth. These silicone straws are nontoxic, flexible, safe for teeth, and compatible with 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.