The Sensitive Tummy nipple keeps collapsing, inverting and is proving difficult to drink from?
The round dome valve that fits onto the bottom of the Sensitive Tummy tube is very sensitive as it is made of specially designed silicone material which can sometimes stick together when not used, this is perfectly natural. To ensure the slit in the dome valve is open before use, flush through with water and gently manipulate the valve between finger and thumb until you see the slit re open.
