I used to always take my tissues home with me from ex-T's and ex-MC's because they had very inconveniently located trash cans. (Ex-MC's was under his desk.) I did that for a while out of habit with current T, then realized he has a trash can conveniently right by the door. It's wicker (with bag in it) and has a lid, so it's a bit awkward to pick the lid up and put my tissues in, as it's also generally the time I'd be handing him my credit card, but I've figured out how to make it work.