also: ソフト・ドリンク
noun
Refers to non-alcoholic carbonated beverages, similar to English usage.
パーティーでソフトドリンクを飲んだ。
I drank a soft drink at the party.
Specifically refers to carbonated beverages; ソフトドリンク is a broader loanword that can include non-carbonated soft drinks.
Loanword from English 'soft drink'.