Sippy cups with a valve or spout can prevent a child from learning to drink from a regular cup, which can cause them to continue sucking on drinks. This habit can lead to structural issues with the teeth, such as an overbite or an open bite.

However, we don't recommend putting boiling hot liquids in your bottle for two reasons: With bottles like the eddy, you'll essentially be drinking a hot beverage through a straw, which makes it hard to gauge the temperature and easy to burn your mouth. Extra-hot or boiling water can distort the plastic.

Since the CamelBak bottle is made with BPA-free plastic (added bonus: it's part of the Tritan Renew line, which replaces 50% of the material with recycled plastic), I can count on my water staying at the right temperature with a fresh taste all day long.

If your Eddy+ bottle is leaking, you might have an object trapped in the vent valve. Turn the cap over, and look under the round, grey, rubber flap. If you carefully peel back the rubber seal and clean out the inner workings of the vent valve, the leak should stop.