Has anyone ever bought a print on demand mug that held up to lots of wear and tear? I'm updating a design I have that I just love on a white mug, but the only long term, practical use for Redbubble mugs is as a pencil holder. The old design looks lovely in china blue, it's one of the few designs that I ever sold, but the customer said BOTH peeled, before I ever saved up enough money to buy my own :(.