I absolutely love my Thermos Water-Bottle! Easy to fill and clean, keeps water cold. The bottle opening is large enough to accommodate standard ice cubes, which was particularly helpful when I was craving icy water through pregnancy. The lid locks securely, and never had an issue with the bottle leaking. The round inner seal in the lid has the potential to fall out and get lost; but I’m careful to wash and replace the seal/valve straight away so I don’t misplace it. I’ve bought several water bottles over the years, but continue to default to my trusty Thermos one! Comes everywhere I go, in the car, on my bedside table, on the desk, in the school pick up line... All in all a fantastic product and definitely recommend.