Carrying around water is vital for staying hydrated. However, bottles just don’t cut it. Introducing the Memobottle Reusable Slim Water Bottle. This revolutionary vessel takes on a whole new form for your water. In fact, it’s designed to slide seamlessly into your everyday carry bag. The Memobottle comes in two sizes, A5 and A6, to hold up to 750ml of water. However, it’s more about the design than the capacity.