I made a cozy for 1 qt. freezer bags from heavy fleece (not the thicker pile).
It has a Velcro closure, is light and very effective.

What is your favorite cozy material (if you use a cozy)?

I've been using washed Mountain House bags w/the the corners trimmed smooth to avoid puncturing my food bag. UL and pack smaller than any other I've used.

I use my Black Rock Down hat. Which ever model I happen to have with.

This is some reflectix-like bubble wrap I repurposed from an old fishbox. Held together with duct tape, it weighs just under 0.5 oz.

I last used a modified mailing envelope that has small bubblewrap. They are available with smaller bubbles in the smaller envelopes. Those thinner bubbles work well enough, long enough, for the foods and temperatures on my hikes.

First, I bought Reflectrix and it worked too well for me. The food stayed too hot for too long, with the first bite burning my mouth when I was very hungry. For winter temps, or for more people than a solo hiker, reflectrix could do well.

Sounds like I'm suggesting thicker cozies for colder temps--what a concept--I could try that on my sleeping gear too. ;)

I make my cozies from 3/8" closed cell foam I get from an upholstery supply company (UFO in San Diego).

Works MUCH better than reflectix-like bubble wrap.

Steve

Ike's method works best for me. It works as a cozy, and then I stick it underneath my sleeping pad overnight for extra insulation there.

--B.G.--