Best liquor store to buy cup sake? [MA, Somerville, Teele Square]

Hi–I would like to buy cup sake (single servings of sake in a decorative glass cup). Is there anywhere in the Somerville/Cambridge/Arlington/Medford area (or farther) that sells this? Thank you.

I’ve never heard of cup sake, but perhaps Reliable Market in Union Sq. might carry it?

yeah, that might be the best bet

SavMor Liquors has it. Several types.

Thank you all! I appreciate the help.