We have several Yeti products, but the one the family uses the most is the 18oz Rambler. It fits in the car cup holder and in the bottle pouch on most backpacks. Never have your ice-cubes melt in your cup on a long, hot hike again. I also enjoy my Yeti wine tumbler. Doesn't sweat if you are out by the pool with a nice rose. Plus it isn't glass. Safety first. ;)