This page explains how to solve the quest "Mixed-Up Drinks" in Yo-kai Watch.

Start the Quest

Go into the candy shop in Blossom Heights and talk to the boy to start the quest.

Get the drinks!

Use vending machines to get a Y-Cola and Soul Tea. Then go into the Hot Springs during the day and talk to the girl behind the counter to buy a Fruit Milk. Give all three to the boy to complete the quest.