Multiply stack size and/or weight of any item or item type, by a general multiplier, or a multiplier specific to the item type or item name
Small changes concerning balance, gameplay, or graphics.
More than just chests.
Play it your way.
The type is very broad. Please also allow sub-groups such as "science-pack", "raw-material", "intermediate-product", "belt", and so on.
Additional Info: - https://wiki.factorio.com/Data.raw#item-subgroup - https://lua-api.factorio.com/latest/prototypes/ItemSubGroup.html