Japanese by Example
Learning through examples in manga

This coffee with これ

Manga panel from ご注文はうさぎですか? showing example of This coffee with これ.
ご注文はうさぎですか? » Volume 1 » Page 11

Cocoa tries to show off her ability to recognize the three types of coffee Chino made for her.

ココア:
これがブルーマウンテンかー」
This is Blue Mountain.”

これ is used because the referenced object (the coffee) is near the speaker (Cocoa).