This is a ZAKU BORN wooden masu (square wooden cup) set. Thank you for viewing. These are masu from a famous sake brand. I received them and had them on display. I have never used them for drinking or putting alcohol in. Here are some rough measurements for reference: ZAKU: 7.8 x 7.8 x 5 cm BORN: 8.3 x 8.3 x 5.7 cm ・Please read the profile section for a smooth and pleasant transaction for both parties.