We love printing on tumblers, and our favorite to print are YETI brand cups. Just so you know the essential legal details about the products we sell and print on, here is our disclaimer for the items sold on this site:
The item for sale is a YETI product that has been modified after purchase by a third-party entity. Any warranties offered by YETI do not cover custom engraved YETI products. The seller of this product has no relationship to, or affiliation with, YETI.