On our 4 most recent cruises, it seems to be the tote bag on every cruise. However it did take a couple cruises to figure out that each Tote had the name of the ship, so I guess they are all a little different.
I can suggest that if you ever go on a Members Cruise, make sure to leave room in your suitcase before traveling, as you recieve new and different gifts everynight in your stateroom. Tote Bags, flashlights, pens, backpacks that extend out to be a suitcase, picture frames, travel documents, etc.