Someone is giving away 55 gallon drums. The only thing is that something was store in the plastic containers. Please tell me if you think these plastic containers would be safe to store feed in or not? This is how he described the 55 gallon drums. We have empty 55 gallon drums that we currently cut up and throw in the dumpster. The drums either had resin (Sealaction 500) or isocyanate mdi (which is water soluble). Both are non toxic chemicals. They are empty and some are cleaner than others. Should not be too hard to clean. They have a 6 inch hole with a cap that comes off on top. What do you think? Will this harm my animals if I store feed in them?