Reusable Zippo hand warmers for cold nights/mornings and those compressed towel coins to wipe your face/ass/tears are life savers in the field.

Links for reference:

Zippo Hand Warmer

Towel Coins

-Small Nalgene bottles for re-packaging other consumables

-Disposable towels

-Toe socks for wearing with sandals in camp

-Anker battery for charging devices on longer trips

-Folding chopsticks

-Snowpeak double wall stacking mug

-Tiny bluetooth speaker for camp. I have this one at 3 oz I always feel it's worth the weight, there may be newer models out now