I tend to use the "dip" method rather than the "pour" method for basing. That being said, a lot of containers of basing material won't comfortably let you dip a large base into them. I bought a couple cheap tupperware containers at the grocery store-- half gallon 'uns-- and filled one with sand and one with Woodland Scenics static grass (which is identical to Citadel Static Grass but you get a quarter gallon for the same price...).
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