I purchased this as a gift for my husband who does a million and 5 things in one day. He had a really bad shaker bottle that would leak frequently and not mix very well. I got him this not even knowing about the added compartments and this bottle is a game changer!! He puts almonds or granola in one of the compartments and his protein powder or electrolytes in the other compartment so that it's ready and easy to remember his supplements. I even saw one day that he used one of the compartments to put his vitamins and daily medicine which I loved. Anyway, when they are restocked, I will be buying one for myself and my mom!