Review on 🧒 YETI Rambler Jr. 12 oz Kids Bottle: Durable Straw Cap for Hydration on-the-go by Matthew Davenport

Leaks constantly. Almost every day you throw away the whole cup when it's on its side. We have a couple of these and both are licking profusely. They submitted a warranty claim and this was their response: Thank you for contacting YETI, I hope everything is ok! Leakage is possible due to the umbrella valve installed in the straw cover. This umbrella valve sits under the straw when it is resting and helps release the pressure in the bottle's internal environment in order to use the straw. This is most commonly seen when the bottle has been lying on its side or tipped over for a long period of time. If this is the case, the water can get under the straw, so when you turn it over, the umbrella valve will drain the accumulated water.