I have recently gotten into DTF (direct to fabric - a major step up from the old "iron on" stuff of the past) transfers on fishing shirts and sports fans clothing, and wondered if there might be an interest in anything like that for orchid societies or individuals? You create an image and I can have it made. Photos, too.
The costs are remarkably low for quality shirts and the transfers, depending upon the size and if you get enough at one time. With a society logo on the left chest, I speculate that the washable t-shirts would run about $10-$15.
I've attached a few of the designs I've done. They're not on white backgrounds on the clothing.