So my LO actually uses this, it took some practice and a lot of biting and playing with it but she drinks her milk at nursery in this fine and she's an EBF baby I tried it myself before giving it to her and it is quite difficult so I dunno how she's doing it tbh lol
They are sooo hard to get anything out. I had to try myself. Basically you kind of need to bite down and suck is the only way. I binned mine!