World leading venting technology, keeps air separate from milk when baby is sucking, avoiding excess gas and tummy discomfort. The bottles feature their own unique cleaning system which is not always necessary, but useful if milk does get stuck in the valve.
Borosilicate glass is the same type used in laboratories due to its superior strength, durability and heat resistance. It is also much lighter than traditional glass that is used for baby bottles.
Please note: for hygienic reasons, teats should be replaced every 3-4 months or at first signs of wear.