I bought 4 of these for boiling water on river trips, such as the Colorado River in the Grand Canyon. We use them in a 4-bucket dishwashing system. I checked to see if they leak, & they don't. I gave them a lesser rating because there are sharp little spikes around the inside. One spike had to be smoothed down with pliers, otherwise, someone would get cut! I'm sure that this is created from the "hot dipping" method, but one would think that quality control would deal with this issue!
The heavy duty packing box was pretty worn by the time it arrived. There were 21 packing balloons, 17 of which were deflated. Consequently, the top pail's handle tabs where it connects to the pail was bent in both handle areas. Pliers straightened that our, but has weakened them as well. Considering that I paid $35.29 to have them shipped from Virginia to Idaho, I was not impressed with the packaging, or the time that it took for them to arrive (11 days). I haven't used them yet, but I'm sure that they will work for boiling water, & hopefully they won't warp.