I got the Ninja US-Ninja Thirsti™ 24oz. Travel Bottle, Black for my husband and he really likes it. He works in the heat and love to drink his pop (or soda...depending on where you live lol. He said it keeps his pop cold and tasting great. He also likes the plain sleek black bottle. He also said the Ninja US-Ninja Thirsti™ 24oz. Travel Bottle, Black is leak proof. Even though it was knocked over his pop still had the fizz. It is super easy to clean so that is major plus for me.