RBX.lua.Backpack (Object)
From Legacy Roblox Wiki
The Backpack object is a container that holds a player's inventory. In the current release of Roblox, it can hold both HopperBin and Tool objects.
When a player spawns, the contents of the StarterPack service are copied into the player's Backpack.
But, if an item is added to the backpack while in the game, it will not appear back up once the player respawns. The player will have to get the Tool/HopperBin again if you loose it after death.
