Sure, you can have your tea if we can get out Sunbucks and donuts. Libertonians prefer their coffee to tea, so I don't think there'd be much of a market in Liberty. Well, relatively, of course. There's quite a few billion people in Liberty.:P
And if it's going to be a low value commodity, very few people will trade it, which will negate the value of even adding it as an RP commodity - you may as well just use consumer goods then, like everyone else is doing, and save the devs for some work.