If you are breastfeeding your baby, using a feeding bottle and teat may interfere with the baby's natural way of suckling your breast. Cleaning Instruction: Before first use, clean the product and place in boiling water for 5 minutes, this is to ensure hygiene. Always wash the product immediately after use. Clean before each use. Wash in warm soapy water and rinse in clean water or use a dishwasher (top shelf only). Once you have cleaned your bottles they are ready to sterilise. All bottle components should be sterilised All bottle components are suitable for sterilisation by steam (electric or microwave), boiling or cold water tablet/liquid solution Failure to sterilise correctly could harm your child's health