Title: Looks great, but Not Functional
Review: Also have found this sippy fairly non-functional. Unless you get the sippy portion in just right and tighten it extrememly tight, it leaks. So far, we've only been able to use for H2O due to leakage. Does keep stuff cold, but for only 7 oz, does it really matter? It's empty within a few sips. Also an issue is it's weight. My toddler has a bad habit of throwing his sippy's in the car, so with this cup, we've got a dangerous flying projectile. Too bad, b/c we love the concept of a non-plastic thermos.
Is this product review negative?