Origami Water Tank | Conventional water storage options are not always affordable. Origami water tanks adapt traditional origami water balloon folding patterns to water storage. They are low-cost, light weight, easy to transport and easy to construct from widely available materials. Prototype tanks with a storage capacity of 440 liter were constructed with 6 mil polyethelene greenhouse sheeting and exterior grade duct tape. Wooden palettes provide structural frames for the tanks.