I'm sure quite a few of you have made use of silicone funnels, but I couldn't find a dedicated thread on it, so here is what I like about them:
Silicone funnels usually come in a three pack. I've seen them at Walmart and Target as well on amazon.com. Being made of silicone, they are flexible, heat resitant, and multi-purpose. They pack flat and usually ride in my cooking pot. Of the three sizes, I usually carry the smallest when solo, but in a group I prefer the medium size. The large one stays home in the kitchen.
So the smallest silicone funnel comes in at .7 oz.
The medium comes in at 1.4 oz. Weight may vary based on the brand you buy.
The medium sized funnel can be used as a pot lid (avoid direct contact with flames):
Being silicone, heat resistant to about 450 F, and grippy, they make a great pot grabber:
Any round or conical object made of plastic, rubber, wood, glass, metal, or stone wedged into the hole of your silicone funnel will create a water tight seal and allow the funnel to work as a bowl or mug. Being silicone, it handles hot liquids very well if you exercise caution:
And it goes without saying that a funnel is great for filtering water into your water bottle and for brewing coffee (tip: I keep a small noseeum mesh ditty bag in my cook pot, if I put this in the funnel first, then the paper filter over it, I get much faster results when filtering water or brewing coffee):
I'm sure there are lots of other uses as well.
I could imagine a funnel being used as a drip line for a tarp or hammock.
A funnel not used for ingested liquids can be used for fuel or in conjunction with a pee bottle.
I suppose it could work in place of a brush for scrubbing clothing or calluses on your feet.
In a creek, I suppose you could catch crayfish with it (though I would probably use my headnet for that).
I digress :)