Hot answers tagged ultralight
If in doubt, double bag... put them in a sealed bag of your choice, then put them in another sealed bag with the open end (of the first bag) facing towards the closed end of the second bag, if the first leaks the second should catch it.
Your best bet is going to be small mylar pouches (any other thick plastic you can get your hands on will probably work just as well). They hold up much better than flimsy freezer bags and have a thick reassuring seal on the edge. You can get them resealable as shown, or you can weld non resealable bags closed. What you're really going for is something ...
I would probably use a small tupperware or similar, something like this. You can also get ones where the lid clips down which are probably more secure. If you are concerned about it leaking/coming open I would use some elastic bands to secure the lid and store it in a separate freezer bag to contain any leaks. Using a freezer bag as you suggest may work, ...
Out of some wonder, the peanut butter in our area comes in plastic jars, meaning that it is lighter than a normal jar. I save these plastic jars during the year and use them later on hikes. Also, in the local grocery stores I can buy some dairy products which come in plastic buckets and boxes (like this one, this or this) - I save these for trips and ...
GoToobs. They're food grade plastic, super light weight, and reusable.
Try Coghlan's Squeeze Tubes (available from REI) http://www.rei.com/product/696007/coghlans-squeeze-tubes-package-of-2 The base of the tube opens up so it's easy to fill and then closes securely. It's easy to squeeze the contents into your mouth, or on to crackers or other media for eating, without using utensils or trying to lick/scrape the gooey contents ...
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