I bring the LW cooler. Cost about $20, if I remember. It's not too big, and it can carry enough to get me through 3-4 days of tight turns and a lack of good choices. It does save me money, but more importantly, it saves me from going w/o on the 20min turns. I follow about a 80% Paleo diet, so I pack a couple sweet potatoes, nuts, dried fruit, and my go-to is a mix of Starkist Tuna, avocado, almonds and homemade mayo. I also try to cook something beforehand and carry some leftovers. I carry a Sea-to-Summit collapsible bowl for non hand-held stuff. I also carry a few Larabars.