Why should adults have all the fun? Keep kids hydrated and happy.
There is no set rule but we find our .3L/10 oz. bottles work well for little hands (ages 1-3 years).
The .4L/13 oz. bottles are great for those a bit bigger (ages 3-6).
As kids get older and more active they usually switch to our .6L/20 oz. bottles by around age 7 or 8.
