local invID = ContainerIDToInventoryID(1)
local bagLink = GetInventoryItemLink("player",invID)
DEFAULT_CHAT_FRAME:AddMessage("Bag slot 1 is inventory slot "..invID..", a "..bagLink)
Result[]
Bag slot 1 is inventory slot 20, a [Imbued Netherweave Bag]
Notes[]
Querying for items outside the range 1 -- (NUM_BAG_SLOTS+NUM_BANKBAGSLOTS) throws an error.
The player bags begin at container 1 -- currently inventory slot 20.
The bank bags begin at container 5 (1+NUM_BAG_SLOTS) -- currently inventory slot 68.