The To Go Buddy does keep liquids cold, even overnight. However, in my first week of using my To Go Buddy, the ice was melted each morning. That is, the hype that I've been reading isn't true. Also, when I ordered a lid for my To Go Buddy, I wrote Frost Buddy to ask whether the straw pictured online was included. They said that it wasn't. I told them that they should add a Description online to say that the pictured straw wasn't included, because it was misleading. Imagine my surprise yesterday, when the lid showed up with the straw. I'm only 300 miles from Bloomingdale's, but it took forever for the To Go Buddy to get here after it was shipped. The lid arrived super fast, though.