The Unicorn Magic Sport Canteen has become my daily go-to. It keeps my water cold for 25 hours, and I've also used it for hot tea, which stayed warm for up to 12 hours. The wide mouth makes adding ice cubes easy, and the loop on the cap is handy for clipping it to my gym bag. I use it at my at-home office and during workouts. The design is fun without being over the top. It does exactly what it promises, and I'm drinking more water because of it.