Bright colored silicone sleeve (patent pending) helps to protect the bottle from breakage and provides a great gripping surface and tactile experience during feeding;Bottle and sleeve can be boiled or put in the dishwasher together.;Bisphenol-A (BPA), phthalate, and polyvinyl chloride (PVC) free;Silicone sleeve is non-toxic and free of plastics;Silicone nipple is non-toxic and latex-free