A couple of weeks ago, on one of those "make your own product" sites, I was tooling around with a shower curtain design:
After adding an image - like the GRCLogo-water-s design made by @hotbit and shown in this post - you get a unique link for manipulation: https://fineartamerica.com/custom/create-custom-products-make-opaque.html?uniqueid=31618
By visiting the site through this link, anybody can make a product with the image you've uploaded. Transparency makes it so you can change the background colour. Click "Show More Colors" to reveal a colour wheel. It's pretty fun to play with...
Edit: it seems the link is dead now. Not sure how long they stay up for... maybe until the original user closes the browser?
@o0pepper0o and I are definitely ordering a Gridcoin duvet cover, throw pillow, and coffee mug sometime in the near future. I'll more than likely make a post when we receive the items.
$60 might be a lot of money for a shower curtain... but it's a Gridcoin shower curtain! :D
Let me know in the comments what you would put the Gridcoin logo on.