Loot Sacks. Rather small for 54mm. More the size of money bags than grain bags. https://www.griffonco.com/collections/outdoor-scatter/products/miniature-crates-treasure-chests-bags-and-containers-for-dungeons-dragons
Treasure Chests. These small chests of loot are my personal favorite. Enough money to be easily carried (and enjoyed) by 1 or 2 figures. https://www.griffonco.com/collections/outdoor-scatter/products/miniature-crates-treasure-chests-bags
Village Barrels. This set of 3 barrels is useful, but smaller than the larger size below. https://www.griffonco.com/collections/outdoor-scatter/products/miniatures-barrels-for-dnd-or-dungeons-dragons
Folded Sail Cargo. What looks like a sail to 28mm figures is a garment or blanket for 54mm figures. And you can never have too many spare clothes or blankets. https://www.griffonco.com/collections/outdoor-scatter/products/folded-sail-cargo
Large Barrel. The perfect size for 54mm figures...except for thirsty sailors! Better get two to be on the safe side! https://www.griffonco.com/collections/outdoor-scatter/products/large-barrel-or-cask-for-dnd-9491
Tarped Cargo. A nice versatile pile of tarped goods. Slightly under knee-high for 54mm figures. https://www.griffonco.com/collections/treasures-loot/products/miniature-tarped-covered-cargo-sets-for-dungeons-and-dragons-9982
Treasure Chest. This bigger chest can be used for more than just pirate gold...women with large wardrobes or emigrants travelling to a new world will appreciate it as well. https://www.griffonco.com/collections/terrain/products/miniature-treasure-chest-set-for-dungeons-dragons
Crate. It does what its name says. Very useful and perfectly sized for 54mm figures. https://www.griffonco.com/collections/terrain/products/miniature-crates-treasure-chests-bags-and-containers