Some areas you'll find 55 gallon HDPE (thick plastic) drums. These work really well! They're anywhere between $5-$50 each or you can by them online for about $85 from Home Depot. There's also a larger 175 gallon IBC tote that's a big plastic cube container within a nice metal cage. These run $175-$200 in my area of the PNW. Any sealed (on the bottom and sides) container that's food grade or brand new will work. People even use plastic garbage cans. You can get as creative as you want or buy an entire setup from someone on FB marketplace or online.