I had an interview at a startup-ish company where they offered me a t-shirt while touring the office. I'm a regular Cayce Pollard and only wear plain black t-shirts and have enough of them (yes... I've read that Marie Kondo book), but I took it anyways. It has since taken its next great journey to Goodwill. This seems inefficient for both me (I had to take it to Goodwill), and for the company (they had to pay for that shirt that I didn't want). Goodwill does come out ahead, so I guess that's some social good achieved.
My question is: is it unreasonable or does it look bad to say "no" to things like this? It's not a huge deal, just wondering if this would look like I wasn't enthusiastic to work at the company (well, it turned out in this case that I was not).