I really like using buckets for primary fermentors, but scratching can give them a short life as a fermentor. Has anyone seen a 6-7 gallon stainless steel bucket with a lid that could be used as a fermentor? Besides durability, I'd like to have a strong lid. I plan on adding a stainless steel coil for cooling into the lid, so I 'd like something more sturdy than plastic. The best things I have seen are old milk buckets, but they have an odd shape and some of them are quite expensive. The other option I was considering was using a stainless steel kettle. The only problem with this is getting a lid that will seal very well. Any ideas on how I could modify a kettle to have a lid that seals very well with a permanent device for sealing, i.e. not some hand clamps or aluminum foil, etc. A screw on lid or lid with a seal on the rim and permanently attached latches would be great. I just can't find anything like I'm describing. I'd probably pay $50-75 for something like this if I could find it.