What are the classifications of water cups?

Classified by function include thermos cups, coffee cups, beer cups, sports water cups, car cups, etc. Classified by capacity include 5-ounce mini water cups, 15-ounce portable cups, 32-ounce cycling water cups, 64-ounce fitness water cups, etc. Classification by material includes stainless steel water cups, plastic water cups, glass water cups, ceramic water cups, melamine water cups, etc. At the same time, water cups are also classified on the market according to age and gender, such as children's water cups, student water cups, women's water cups, and water cups for the elderly.