Titanic Mugs and Cups
The White Star Line controlled all things about their ships, including the cups and mugs aboard all their liners, and 'lesser' ships. Their logo was only displayed on the finest, but all the same in keeping with whatever class they were assigned to. There are many examples of the cups and mugs that would have been used on the Titanic today. The White Star Line, after all, had the specification and kept it.
Today, makers have taken those specifications and reproduced them. You can buy mugs here from any auction at eBay, or even Titanic themed mugs if you are more attuned to that.