Ever been on a cruise? What's one thing you wish you brought that you'd deff remember for nextime?

A very dear friend of mine is getting married. He was the best man at my wedding and his bride's shower is this Saturday. We aren't as close as we used to be but that's what comes with starting a family. I actually have only met this girl once. She's seems pretty down to earth a definite switch from most of the girls he's dated in the past 10 years or so that we've been friends. He is unfortunately a psyco magnet lol. Anyway whatever gift is bring will be an inadvertent message to him. They are registered on Honeyfund.com raising money for a cruise. This is of course on my bucket list as well. I would like to bring an imaginative gift, a well though out something that will be appreciated. So, If you have ever taken a cruise and while you were miles out at sea ever needed something that you will definitely bring the next time what would that be. Something that you obviously wouldn't of thought of being new to it all. Thanx for listening & Blessed Be!