I bought these for my daughter and her dollies as I remember having these as a child, amazing how they haven't changed, but then if it isn't broken don't try to fix it.

The mystery of these bottles is easily explained by way of there being an outside layer of plastic and an inner layer, when the bottle is standing up the two layers are very close together which spreads out the liquid making the bottle seem full, when you tip it up, the liquid empties into the lid which has more room. There is very little liquid used in fact :). I worked this out a while ago when one of the milk ones I bought dried out and there was only a small trickle actually moving about. The mystery of these bottles does not seem to be questioned by children, even though the teat area of the bottle is too big to fit in most average dollies mouthes, they accept that the dolly must be drinking it. The nativity of the young, such a shame we lose that. These bottles are very well made and for £3 for two, this is a good buy. The bottles are very hardwearing and even after being thrown into toy boxes and bounced on the floor; these plastic bottles do not break or crack. After a little while the liquid inside can evaporate and this stops it flowing so easily, but for £3 it is no real hardship to buy another set.