Unless you are in a professional lab don't by sternos. They easy as shit to make. Can, container, egg shells, white distilled vinegar, 2-propanol aka isopropyl, coffee filter. Mix shells with distilled vinegar in container let react until bubbling stops, decant thru coffee filter, filtered liquid is your product (calcium acetate). Heat calcium acetate gently until reduced by half. Let cool mix in about 5 times by volume of 2-propanol or your fav flammable liquid, poor off any excess liquid.
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Pack gel into can. Sterno, for way less than what you can buy one for. Balanced formula:
2 CH3COOH(aq) + CaCO3(s) → Ca(C2H3O2)2(aq) + H2O(l) + CO2(g)
Post your yields for others to see 
