Learn Spanish (Spain): La caña está muy fría.

While caña literally means a cane or reed, in Spain it is the most common everyday word for a small draft beer. If you go to a bar in Spain and ask for una caña, you will get a glass of tap beer, usually around 200 ml.

Why does this sentence use está instead of es?

We use está (from the verb estar) because the temperature of a drink is a physical state or condition. Even though beer is meant to be cold, its current coldness is considered a temporary state, so it requires estar rather than ser.

Why is the adjective spelled fría and not frío?

In Spanish, adjectives must match the gender of the noun they describe. Because la caña is a feminine noun, the adjective for cold must also be feminine, so it changes from frío to fría.

Could I say mucho fría instead of muy fría?

No, you must use muy. In Spanish, muy translates to 'very' and is always used right before adjectives (like fría) or adverbs. Mucho means 'much' or 'a lot' and is used with nouns or verbs.