Diesel prices are through the roof (2.3€/L) but my backup fuel storage is ripe for rotation. Hopefully the prices have gone down a bit once I finish the last canister.
I always struggled with these 30L canisters and only strained my back and made a mess trying to pour it manually. This 14€ pump sure makes thing easier.
They are not intended to balance with open cap on top of a wobbly bucket above porous ground, though.
My reasonable guess is that the storage situation is not much better, seeing that OP did not even bother to do the fueling-up on some sealed surface area where he at least would have had a chance to deal with possible spillage.