If you've got a water bottle in your bag, why shouldn't your kids? One of the easiest switches, a water bottle can be reused over and over again saving thousands of single-use plastic water bottles. 

Start your child early on their own bottle and they'll continue to use it as they get older. Not only that, but these bottles will keep water nice and cool so they can be used on long trip to the beach to build sandcastles or into the wood to play hide and seek.