Frisco 65 quart container via Chewy.
This has a stated 65 quart capacity. My rule of thumb for unmilled grain storage is 5 lbs per gallon. 65 quarts is 16.25 gallons. At 5 lbs per gallon an 8.125 gallon container would hold about 81.25 lbs of grain. That’s a rough estimate based on an assumed capacity. Actual storage capacity will vary.
As of this posting, Chewy has this for just $21.99. Shipping is free to many US addresses with a $49 order.