We had a large version that looked like a very large fire extinguisher 1930-40s, no idea of make but held getting on for three gallons brimmed, had a carrying strap but a bit on the heavy side. My grandfather and my father used it quite a bit and in the 1963 winter was used to thaw water pipes out to get water for the animals, I never used it for weeding but with fire bricks could heat up some serious big bits of metal given time.often had to replace the pump washer, and often a bit of leather used to get in the non return foot valve and pump handle would go up, and was another reason for not carrying it as often would dribble paraffin when that happened.