A Flat-Bottomed Beverage Container
Puzzle 17 of Housewarming Gifts Pack
Question is: A Flat-Bottomed Beverage Container
and the answer is: TUMBLER
Word Meaning:
TUMBLER — (archaic) One who tumbles; one who plays tricks by various motions of the body.
Definition source: Wiktionary (CC BY-SA 4.0)