The Leaf is made of non-toxic silicon and fits standard neck PET bottles. The veins structure reinforces the product making it both strong and flexible. The Leaf is extremely easy to use: it can be clipped on top of a bottle and then fold to create a bowl. The water is squeezed out through a membrane, which allows to give as much water as needed. Once finished, it gets closed with an integrated hermetic top and reversed back to enfold the bottle.