We brought 3 12 packs of water, a large bottle ofapple juice , some juice boxses and beer for me, DH, and my 2 DDs. We drank it all and were very glad we brought it. We used it for all the excursions and on CC. We packed it in a large LLBean duffle with the lifejackets for our kids. It worked out great for us and we had plenty of room for all the extras we bought while we were there. I think for the 4 of us it would get pretty expensive for water and juice if we bought it all on the ship. I rather save the money and spend it on souveniers or excursions.