First off the best thing about this bottle is that it does NOT leak! I've had so many bottles that leak and this one doesn't! No straw either which is another bonus. The large top makes it easy to clean inside - my hand and sponge fit inside easily. The insulating sleeve works great to not only help keep your drink cold in warmer weather but for holding it. (The bottle itself has a nice grip pad on it too). Tip- freeze your fruit ahead of time to add to bottle! I'd give this bottle 10 stars if I could.