I bought this Swig confetti mega mug for its size and for the colors. I’ve used it a couple of times and it was okay. The other day, it blew me away!!! Here’s what happened—I filled it with loads of ice and water to sip while watching tv. I fell asleep and because I like to have water first thing in the morning I left the mug as it was—water, ice and all. Next morning, took a sip out of my Swig mega mug. THE ICE HAD NOT MELTED!! It lasted 12 hours. The cubes were a little smaller but not much. I thought that was amazing. Ran errands all day, got home and had a drink out of my mega mug. The ice level went down but it was STILL HALF FULL OF ICE!!!! That was 24 hours. Incredible. Just another reason I love this mug. I didn’t know the mug kept drinks so cold because I usually drink a ton of water. Yesterday was a happy mistake!!! I love my Swig Mega Cup!!!!