We use the 10 gallon galvanized can as well. We picked ours up at Tractor Supply and it was under $15. It holds plenty of feed but doesn't keep the ants out. We had to spray around the bottom to keep the pesky things away.
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So now we are trying to find something else to use and also have to buy more feed and its memorial Day weekend. Nothing is open till Tuesday. HOPING the feed i have in the other bucket is enough to get us through.