What does 瓶子 (píng zi) mean in English?

Card 315HSK 2010 Level 4315/586
CARD315
PROGRESS54%
瓶子
píng zi
bottle; CL:個|个[ge4]

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d