Review on Munchkin Simple Clean Straw Cup, 10 Ounce, 4 Pack, Blue/Green/Pink by John Rodriguez

Idk if the cups I got are defective or what but mine are definitely not leak proof like all these reviews say. They leak from the air vent, a lot(not the straw but the vent next to the straw). Idk about you but my toddler doesn't keep his cup straight up and down at all times. The straw also has never once stayed in the closed position, it just pops right back up no matter what we do, even tried adding paper towel like the one review and that didn't work. Quite disappointed overall but the straw is very easy to clean. Also if you are transitioning from bottles there is a bit of learning curve because they want to tilt the cup, I didn't think about that because we were using weighted straws prior