保証 ほしょう牛乳 ぎゅうにゅうじゃなかったです
hoshōgyūnyūjanakattadesu

Noun
Desu Copula

The polite, past negative form of 保証牛乳

1. Wasn't guaranteed milk.; Wasn't pasteurized milk.

Past/Perfective
Negative
Polite
Casual Register