First, I love everything about the cup-the size, the color, etc. There are a couple of things that went wrong. The lid or design is flawed. Or I have a lid that is defunct. I put a soda in my cup, snapped the lid shut and stuck it in my purse to take into a performance. When I grabbed the cup, it felt light and I discovered the drink had spilled into my brand new purse. The lid has never worked the same. I'd love to get a replacement lid but not sure about the hassle. I did get a chip in the cup as well. I didn't drop the cup, rather it tipped over while sitting on the cement. I was hoping they were more durable than that.
I really like the product for it's weight. It's very light even after adding water to it. The reason I gave it 4 stars is because of the lid. It's hard to drink out of it. Looking for a different lid with flip top straw.