@Clayton-Smit Nor am I.
Honestly, I have never seen a Sterno iso/butane canister. That doesn't mean they don't exist. Obviously you had leakage around the canister/stove junction, either cross threading, defective threads, or wrong canister.
It would be a good idea to take the canister and stove to the store (probably not open yet) or to your local fire department and see what they have to say.
I have used the same Pocket Rocket for twenty years now without incident, and I now have a second, also working well.
Please let us know what the problem was. Glad there was no really serious damage and that you are OK.
one or more gifts or other benefits from the co-op.