Til'amin froth was a beverage.
Til'amin froth was served in the Ten Forward lounge on the USS Enterprise-D. In 2370, Commander Riker ordered two of them for himself and his date Lieutenant Corell. (TNG: "Eye of the Beholder")
In 2373, Jadzia Dax ordered a Til'amin froth at Quark's. (DS9: "Empok Nor")
Quark was known for his "famous Til'amin froths." Julian Bashir was in the mood for one in 2374, but was informed by Miles O'Brien that he would "have to settle for something else" because Quark was unavailable. (DS9: "Who Mourns for Morn?")
Ezri Dax later ordered a Til'amin froth at Quark's in 2375. (DS9: "Covenant")