Setting aside the fact that we're ending clauses with prepositions all over the place... that's a lovely design, Bubbly, and it's very generous of you to offer it for our use!
Linda, thanks for doing this! It's such a great idea. I'm not a t-shirt kind of gal but a container for my multiple daily cups of coffee might be nice! I think your idea of donating to a worthy 'uke-related charity is an excellent one.