Kayaking or canoeing requires a few accessories and equipment for the comfort and safety of the paddlers and their passengers. For example, it is useful to bring waterproof containers to store all the accessories (electronic equipment, mobile phone, camera, car keys), food, and spare clothes away from water and to protect them in case of overturning of the boat or bad weather. Canoes and kayaks generally have a location provided at their front or at their rear to ensure a good stability for these containers, even in white water. The air inside these screw-top plastic containers also allows them to float and stay on the surface when they fall into the water.