Thinkster Replacement Straws (3 per pack)Free of - Bisphenol-A (BPA), phthalates, nitrosamines, lead, PVC, PET, and biologically harmful chemicals.No Spill Extra soft, medical grade siliconeDishwasher Safe (top rack recommended).Thinkbaby Thinksters are dishwasher safe (Top Rack recommended). We also recommend making sure that the dishwasher is not set to a super hot setting or dry setting, as this will reduce the longevity of the straw. When washing in the dishwasher, we recommend using a detergent that is free of chlorine. Most of the natural detergents on the market from Eco Lever to Seventh Generation should be free of toxic chemicals. If hand-washing, the American Pediatrics Association suggests using warm soapy water, but only if you live in an area with treated water systems.
Before first use, we recommend sterilizing the straws in boiling water for 2 to 5 minutes before first use. We do not recommend utilizing sterilizers, as we cannot guaranty that the ones on the market were made with safe materials.