Packing container for gooey trail concoction?

If you cut the top off a platy and filled it with what you will, you could roll down the top and clamp it with one of these

If you are using a bear canister or your food, don't worry about the smell.
You might be better off packing it into pint freezer bags with a spatula at home….

http://www.rei.com/product/696007

Yep, those Squeeze Tubes are perfect for peanut butter! Cheap, light, get smaller with use and re-useable too.

Does anyone know of a smaller squeeze tube than the standard Coghlan's version? For certain uses, I'd like to find something with maybe 1/4 the capacity.

REI does sell a smaller one, it is silicone I think?

Yes, Sarah, the Humangear tubes. I think they're designed for thick stuff like shampoo and conditioner, etc. Trouble is, they're a bit heavy, and I think I don't trust them for carrying runny liquids like melted margarine, olive oil, etc. The flip-top caps would likely leak. The screw caps of the Coghlan's tubes are pretty secure. Maybe you should sell recycled toothpaste tubes on your web site?

"Does anyone know of a smaller squeeze tube than the standard Coghlan's version? For certain uses, I'd like to find something with maybe 1/4 the capacity."

How about just cutting the tubes to a smaller size? Saves grams to!!

"Trouble is, they're a bit heavy, and I think I don't trust them for carrying runny liquids like melted margarine, olive oil, etc. The flip-top caps would likely leak."

I have a Goo Tube – the sunscreen I put in it is pretty fluid. It has a valve that works pretty well to keep things inside the tube.

What about something like the Hammer Nutrition Gel Flask?

I've also seen empty toothpaste tubes that are designed to be refilled – something like this would shrink in size as you go and seems it'd be easy to squeeze the substance out of.