Can you heat water in them by placing them over or on a fire
1595723
I am sure you probably could in an emergency -like you could with a tin can. However, I would not want to rely on it. It would be awkward/dangerous with no handle. I have been camping many times and there are a lot of excellent purpose-built fire cooking products out there.
2124113
No - we have no used them much as our electrical is not wired correctly outside. You should have them high up and project where you want heat.
614291
Sure, as long as you soak them in water before you use them so they do not burn.
1536813
I really think in an emergency situation you could use them over a fire, but I would use a regular stove or hot plate maybe even a propane burner.
969814
Yes. They're made of silicon, so you won't get a drink hot enough to melt them. They're not so thick that you won't be able to feel the liquid coming up, but not so thin that they're flimsy, either.
2254302
Put 3 of them under the chimney, over the chargoal grill. There is a dead space under the coals in my chimney where you could put anyrhing, like paper or cubes!
2138667
Not with a fire in it. All of the connector pieces are made of plastic and probably would not hold up to the heat.
1626225
Yes you can. The body of the bowl is hollow with the tank inside. Flames are on top. Doesn't get hot on the bottom.
337972
They do the heating. I think you could use them with charcoal, but they aren't designed that way. You can't soak them or they turn into dust. For coal or gas i would buy lump wood.
1936829
No. These aren't hot, just warm. Not even as hot as a heating pad. In fact, if the wood base is very thick, it might not be an effective way to heat the tank.
1726663
No. These are electrical plates with connections for the grill they are designed for. Putting them on a fire would ruin them, if not creating some actual hazard.
80797
Yes, you want to saturate them with water, but you don't want them so wet that they're dripping. This will keep the strips from burning
641788
Yes. You can put this directly over the campfire or on a pocket rocket stove.
30264
You could. But you would have to stay away from the burners and any surface that is exposed to excessive heat.
1090436
Yes, but be careful, they crack easily with putting them in there...and, yet they still hold the heat for a long while.
1554318
These will definitely boil water, and can pretty much cook anything that can be cooked with Sterno, but the fire produced by these generates about 2/3 of the heat produced by Sterno. In an emergency situation I see little problem arising from this, as there is not any real need to be in a hurry . The flame is more easily controlled than with sterno.
797622
You can run them under really hot water and if that doesn't work take a spoon and wedge it between the glass and lid and lift it a bit