CUP HOLDER

A cup holder includes a holder main body having a retaining portion, the retaining portion being configured to receive and hold a beverage container on a bottom wall. The retaining portion includes an upper opening for receiving the beverage container, the bottom wall for supporting a bottom of the beverage container, and a side wall formed between the upper opening and the bottom wall, and has a cylindrical shape. An inner diameter at the upper opening is substantially the same as an inner diameter of the bottom wall.