Square box used as a sake cup. Traditionally made from cedar, but also now made from plastic, lacquer or even glass. This square shape was originally used as a measure of rice. A standard masu size has a fluid volume of 180ml/6oz, known as one “go” or ichigo, but masu do come in a wide variety of sizes.
Disclosure:
Bear in mind that the links to Tippsysake.com on this site are affiliate links and if you go through them to make a purchase I will earn a small commission. Keep in mind that I link to this company and their products because of their quality and not because of the commission we receive from your purchases. The decision is yours, and whether or not you decide to buy something is completely up to you.