Teepublic is an online, print-on-demand service which allows you to sell products such as t-shirts, mugs, stickers, etc., printed with your own designs. You earn up to 31% on each sale.
Curate Other Artists
You can also open a store and curate other artists' designs, if you don't have your own. You earn 11% of each third party sale you make.
Open your store: http://tee.pub/lic/bittube (referral link)