beer mug; stein; tankard
A large, sturdy glass or ceramic mug with a handle, typically used for serving beer. The Japanese word is a loan from English 'jug', but its meaning has narrowed to refer specifically to a beer mug.
from English jug
冷えたジョッキでビールを飲むのが好きだ。
I like drinking beer from a chilled mug.
Drinking draft beer from a mug is one of the pleasures of summer.
店員がジョッキをカウンターに並べた。
The clerk lined up the beer mugs on the counter.
みんなでジョッキを合わせて乾杯した。
We all clinked our beer mugs together and toasted.
He downed as many as three mugs of beer in one night.
Loanword from English 'jug', but the meaning has shifted in Japanese to refer specifically to a beer mug with a handle.