Breast-fed children get to decide themselves when they have had enough but bottle-using parents tend to keep feeding their child until the bottle is empty. This is thought to contribute to obesity and maybe even to developing diabetes.
Today’s invention is therefore a bottle which disguises the amount of formula milk left during a feed (until actually empty). It does this by being opaque and slightly heavier than usual but also by incorporating a sealed compartment part-filled with water.
This makes it difficult for a parent to judge how much milk remains (without removing the top) so that the baby can have more say in when to stop drinking.