whatever you sterilise in this way is safe to boil. Boil the feeding equipment in water for at least 10 minutes, making sure that all items stay under the surface of the water. Remember that teats tend to get damaged faster with this method. Regularly check that teats and bottles are not torn, cracked or damaged. Wash your hands thoroughly. Clean and disinfect the surface where you will put together the bottle and teat. It is best to remove the bottles just before they are used. If the bottles are not being used immediately, they should be put together fully with the teat and lid in place. This is to prevent the inside of the sterilised bottle from being contaminated, along with the inside and outside of the teat.