No need to do even that. After a few trips through the dishwasher the logo will be gone.
However unmarked 200 mL stangen (I guess that's the plural) are available from
http://www.leevalley.com/gifts/page.asp ... 53209&ap=2 and I think they are about a buck apiece. These are not the highest quality in the sense that examples have minor flaws such as a wrinkle, bubble or uneven base but they are certainly more than adequate and, if you like to throw the glass into the fireplace after toasts, appropriately priced.
rob