She didn't ask for it to become calpis, she just wanted it to TASTE like calpis.
I found the 7th tanzaku!
I can now make a wish!No, wish for something else...ImpossibleIt's Dragon Ball...What is that...It's not Dragon Ball hereState your wish...I shall grant you any one wishI want the taste of Calpis to stay the same, no matter how diluted with water it is!
Calpis is a milk based soft drinkImpossible, he says...