My buddy and I are going to do a 17 mile overnight loop hike. I'd like to enjoy some margaritas when we setup camp. Obviously I'm not going ultralight, but I'm curious if anyone has any suggestions for packing ice for drinks (in a backpack) in terms of minimizing space/weight of insulation.
I plan on making bigger cubes, so they hold better, but not sure about best way to insulate while we're hiking. I'll premix some tequila, cointreau, and fresh lime in an insulated metal thermos and leave it in the freezer overnight. Maybe that'll stay cold enough on its own, but some ice clinking in the glass sounds pleasant.
Any pointers for packing ice?