Craving whipped cream on that farmers market pie you bought while out on the boat? With or without a blender, whip cream is possible on a boat! I stumbled upon this link that shows you how to whip cream with only four things: a carton of cream, a mason jar, a freezer (or icebox on the boat) and a little arm muscle. Brilliant!
http://www.saveur.com/article/recipes/whipped-cream-in-a-jar