I just got my 60 lb vaults and 55 lb sack of Marris Otter fit in nicely. I doubt you could get away with a 20 lb container for 50 lbs of grain. The 60’s I got were only $25....well worth it.
Just got my Quick Carb and kegged my first batch with it. Was an oatmeal cream stout. Cold crashed over night to about 42 degrees. Ran the Quick Carb at 13 psi for one hour - was aiming at 2 vols. Unhooked, purged keg, and backed off pressure to 9 psi. Wow! Perfect pour and taste. Can’t wait to...