Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Does this use only sterno or can charcoal also be used?
Document: Filled this with Sterno Cooking Fuel (http://www.amazon.com/gp/product/B002U1PAI4/ref=oh_details_o01_s01_i00?ie=UTF8&psc;=1)  and used it to roast Marshmallows for Smores.It's pretty heavy and after we were finished stayed hot for a while. Left it in the shade for maybe 30 minutes and was cool enough to put back in my backpack. Still 5 stars, though, because it worked perfect.
Operate mini cast iron Hibachi Grill:1. Spoon one to two ounces of Sterno Cooking Gel into inner fuel pot. One ounce will burn for about 12 minutes. Do not use gasoline, lamp oil, lighter fluid or kerosene.2. Place fuel pot into mini Hibachi holder. Place entire cast iron Hibachi onto the center of a wooden platter and light with a match stick. Be sure flame is out if adding more fuel. Carefully place grill cover on top.3.
-one came looking like it was used, the top was marked up- i wasnt aware i had to pay for the parcel when i got it, thought i paid it all when i bought it online, making it more expensive
We use these as a mini s'mores maker at the beach. So much fun and the kids love the little grills.
We use these for fun family night, outdoor dinner night, and parties. Very happy with the quality of the product, and I ordered 4 of these. My boys just love having fun individually heating and searing veggies, meat strips, or even S'mores after dinner.
We love this. We use it for indoor smores and it works great. It is not very big but 2 - 3 people can roast at the same time. It is heavy and seems it will last a long time. We use fire gel which works great. I don't think any fuel cans would fit.
Like others, I spooned pink sterno jell stuff into the cup part of this set.It was pretty much just like advertised: small and well-suited for what it was. I was surprised at just how good it was for roasting marshmallows. Maybe the cast iron grate part helped spread heat so that the marshmallow was toasted evenly?We were impressed.
Bought this to roast marshmallows with our young kids indoors on the tabletop. You need to pour the gel fuel directly into the holder. Bought the small gel fuel tins at the local Safeway for less than online price. We used long bamboo skewers for the marshmallows. It worked out great! The flame was strong, the grill grate height was just right, you can really cook and burn your marshmallows if you're not careful.
great product very useful customers love it will buy more in the near future , great for restaurant and dining
Really cute and perfect for smokes. I washed them after using them once and the top grate got really rusted (on both that I own). Looks terrible now, but still works for smores. The base looks fine.
Answer: The pot is very small. I have not ever used charcoal in them, but if you did use charcoal only one piece would fit. We use sterno gel and put the gel directly into the pot.