What does "We’ll take two drafts of Sam Adams Seasonal." mean in English for Spanish?

In English for Spanish, "We’ll take two drafts of Sam Adams Seasonal." means:

Tomaremos dos Sam Adams Seasonal de barril.

Listen to "We’ll take two drafts of Sam Adams Seasonal.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 3, Level 3, Scene 1