J-Word Play #26 (Answer)

Last week's riddle was:

胡桃を逆さまにすると出てくる飲み物はなんでしょうか？

Kudos this time to Cocomino, Rene, and Vitor. I'm thinking maybe I should start a scoreboard for these...
All three of you guys mentioned how easy this one was. For those of you who didn't get the answer, here's why:

ミルク (Milk)

This riddle asks "When you turn a walnut upside down, what drink do you get?" The first time I saw one of these "upside down" riddles (can't remember which one it was), I had no idea what the answer was. The key here is spotting a Japanese riddle/language pattern. 「逆さまにする」 here means to invert or turn upside down、or to reverse. In wordplay terms, this means you need to reverse "a walnut" (literally the word 胡桃 [くるみ」). When you read it backwards, くるみ becomes みるく。ミルク. Milk.