Elhée physiological teats are designed in extra-soft silicone With an anti-colic valve to help reduce the risk of regurgitation, it has been developed to offer sensations close to breastfeeding. + slow flow is ideal for newborns, breastfed, premature or mixed breastfeeding babies. + medium flow is ideal for babies with infant formula from birth. + fast/ large flow is ideal for babies using infant milk with a thickened formula (anti-regurgitation milk or anti-reflux milk) to facilitate the digestive comfort of babies. Details: Includes: pack of 2x teats (In chosen size). Available in 3 sizes - slow, medium and large. Suitable for 0M+ Made from 100% medical grade silicone. No bisphenol, phthalate, etc. Made in France. Care: Clean thoroughly using hot, soapy water (fragrance-free dishwashing liquid). Compatible with use of dishwasher (top rack) - do not mix with dishes containing tomato sauce, mashed carrots/ squash or spices that can stain the silicone. Sterilisation of baby teats/bottles is no longer recommended as proper effective sterilisation requires drastic hygiene conditions however if you still wish to, it is recommended to disassemble completely and immerse in a pot of boiling water for 5 mins and dry in open air on a clean cloth. It is also possible to use a compatible electric sterilizer such as the Avent Electric Sterilizer. For a longer shelf life of the bottle, do not sterilise and cleaning by hand is preferred.