脂肪 しぼう牛乳 ぎゅうにゅうでしょう
mushibōgyūnyūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 無脂肪牛乳

1. Skim milk, probably.; It's likely skim milk.

Polite
Presumptive
Conjecture