Me: "Sure, I'll take your cider."
Barkeep: "Turns out we just rotated to a different one, would you still like it? <provides sample>"
Me: "Oh! This is good! Yes please"
<time passes>
Me: "Huh, what brand did you say?"
Barkeep: "hmmm, I think it is wild cider, but let me check"
Barkeep, coming back: "so, uh, it is wild cider, and it is supposed to be served in 4 oz glasses. I'm not going to charge you anything different, but you should probably know it is 8%"
That is, in fact, good to know
