For any bottles you bring to work, you should just stamp the instructions right on the bottle in the place of a label. It should read something like, "THIS BOTTLE MUST BE RETURNED ONCE EMPTY. IN ORDER TO PROPERLY ENJOY THIS BEER YOU MUST
A.) Serve it at xdeg F
B.) Pour into appropriate glassware
and whatever other rules you decide to apply...
IF THESE RULES ARE NOT FOLLOWED, YOUR FREE HOMEBREW PRIVILEGES WILL BE REVOKED INDEFINITELY"
come to think of it I think I would like to make a label like this, just for humor's sake!!
ha ha i love it. Please do so that I can put them on the back of my bottles as well