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Your drink will taste batter when you know that the cup it comes in is better for the environment.

Hi,

What does "it comes in" in the above refer to? Does it mean "the drink is contained in?" Thanks.
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And here's a native checking in: "in which it is served".
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NB - Your drink will taste better not batter.
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Comments  
I'm quite sure it means served in but I'm not native
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