FEATURES: Both Nipple and Bottle is made of Medical Grade Silicone Very safe, safer than any type of plastic bottle Safer than glass Free from harmful elements BPA Free, PVC Free, Phthalate Free Designed to mimic breastfeeding in shape & touch The nipple has a wide mound that helps babies to naturally latch, similar to breast feeding. The soft, silicone body provides a tactile feel that is closer to skin. SAFE IN... 1. Boiling water - Place in boiling water for 5 minutes 2. Steam Sterilizer 3. Microwave - If you are using microwave steam bag sterilizers, please follow the instruction provided in the packets 4. Dishwashers - Top- rack only, avoid being too close to heating coils. 5. DO NOT USE UV STERILIZERS. ( There is no clear information about the risks or harmful effects of UV Sterilization. Overexposure to UV may generally lead to faster material degradation. )