As a recently-booked, first-time cruiser, I'm reading a lot about people who bring their own cups on the cruises. Specifically, this "tervis tumbler" thing seems to be a favorite. I have no idea what that is, but many frequent cruisers seem to think there is need for their own cups.
Why does everyone bring their own cups - whatever kind that is? What are the advantages/disadvantages to this? Can we purchase them on the ship if we want? Just hoping for some clarification here!
Anyone have photos of their beloved cups?
Why does everyone bring their own cups - whatever kind that is? What are the advantages/disadvantages to this? Can we purchase them on the ship if we want? Just hoping for some clarification here!

Anyone have photos of their beloved cups?