Is the water cube app formal?

Very formal.

Water-Cube Water Cube is an authorized trademark obtained by Haosha International Co., Ltd. and National Swimming Center Co., Ltd. at the grand signing ceremony held on April 20, 2003.

After signing the contract, the National Swimming Center will provide Haosha with the exclusive brand user license of the "Water Cube" brand in the research, development, production, sales and promotion of swimming and swimming-related clothing and accessories, and its globally registered countries and regions. At the signing ceremony, China 10 supermodel showed the audience the elegant demeanour of "Water Cube" swimsuit.