I might have one better for you!! Instead of buying a neck cooler, try using emergency ice packs that you buy in the first aid section of any Wal-mart, Target, KMart, etc.. I did this on my last trip and they are PERFECT. They weigh next to nothing, require no coolers/fridge/freezers to activate, and when they give out, simply toss them in the garbage. Plus, they dont get wet and slimy, and last anywhere from an hour to four hours, depending on the brand/quality. You cany buy the "cheap" brands for about .99 cents for 5.