I just recovered the empty Mainstay ration packaging from my tool kit. I was about to toss them out, when I realized they were in remarkably good shape. As an experiment, I filled one 3/4 full ( about 24 fl. oz.) of water, ducktaped the top and tossed in the freezer. I then let them defrost. there is no leakage. I have folded one up several times, slipped it under the paracord covering my kit for a day in my pocket. It still holds water. If you use any similar freeze dried packaging check it out as an alternative to a condom.They will burn readily and drop melting globules, so direct cooking over fire is out.<br><br>

Interesting. I'm not familiar with Mainstay rations. Is this an outer packaging bag for an MRE type meal? Is it a heavy duty plastic or Vinyl?<br><br>Willie Vannerson<br>McHenry, IL

Could you use a vacumn sealer to create a new seal on the bag? Liquids are often difficult for vacumn sealers.<br><br>

Packaging is an aluminum sandwiched with a mylar type plastic. They make pocket envelopes of water similar to that used by the military.<br><br>

I tried mailing an ice cube to an enemy when little. Idea was it would melt and get him wet when opened I have no idea! It just occured to me it would make an expedient gathering container.<br><br>