You can keep two cups drinks at the sametime. It's also a storage box or holder for your smartphone, glasses, cables,coins, keys,car ashtray etc. Innovative with a dual purpose adjustablebrackets design keeps your phone and drinks at the same location at the placethat it is the most comfortable for you to reach. It is the only cup holder adapter with anadjustable base and elastic clip to keep your bottle secure ensures that theadapter will fit snugly into your cars cup holder The one-piece design makes it with moresecure to hold the water bottles firmly when driving down the road.