That cooler pouch does seem to invite all sorts of creative uses, doesn’t it? I’m partial to sliding bundles of fresh herbs in there if I’m out trimming lemon balm or mint—keeps them cool just long enough until I’m back in the kitchen to tie them for drying. Haven’t noticed any lingering smells, but I do let the pouch air out on a sunny day every so often, just in case. For heavier or wetter clippings, I’d second the idea of using a produce bag liner; makes cleanup so much easier and prevents any seepage.
As for the insulation, lining it with a bag hasn’t really changed how long my iced tea stays chilly, but then again, I’m not out for hours at a stretch. If anything, the bag seems to keep things tidier, especially after a morning’s worth