We wanted to get away from plastic and aluminum bottles and have come across this bottle. It is a disadvantage for us that the product for younger children is not easy to handle, you have to be precise when assembling and screw again, my 2 year old was too big to start the opening and he has banked itself when the bottle full was. But it was only a matter of practice. Unlike the other review, my daughter (4.5) is better off alone clearly with the Emil bottle.
We are nonetheless pleased with joint excursions we only have these bottles.