Do not keep any goods with an orange peel for longer than a few hours! It can grow mold and give you a lung infection. Lettuce works the same as an orange peel, but doesn't give any flavor. Glass jars are great, I have a Nalgene screw top jar that works well for camping, I also use a small wood box to dry out stuff that is wet, and then a space case kif jar for shake and kif.