As a modular containers set, "Bottle+" is space efficient and flexible. It is designed for people who want to use their own shower products during the journey or after the gym. Each "Bottle+" consists of several modular units (50ml/unit), which could be separated or locked together by the dovetail joints between each other. It is convenient for people to fill the containers with their shower gel, shampoo, hair conditioner, facial cleanser etc. These containers can be combined together and easily carried in one hand. On the trip, the "Bottle+" can be safely taken on board. Additionally, for the visually impaired or blind people, there is a relevant braille on the cap of each bottle to help them discern between the different shower products.