Drinking bottles by Sigg are popular for their versatility: there is the right bottle for everyone in the assortment. The Kids Bottle Top Complete is available as a closure especially for children.
The Kids Bottle Top Complete has a cap for the drinking valve to remain clean, even if the bottle falls down into the dirt. That's not only practical for children, but for people while they're doing sports or other outdoor activities, where the bottle and its closure have to be "taken" as well.
The Kids Bottle Top doesn't only fit on the children's bottles of the Swiss manufacturer, of course, but on all the other bottles as well.