Item sharing
Most items in Dota 2 cannot be shared with other heroes. The hero who bought an item is considered its owner, and only they can use, sell, or upgrade it.
However, most consumables are completely shareable as they cannot be upgraded, and only grant temporary effects. These can be used also by heroes that do not own them. This allows support heroes to purchase items to share with their team.
Some permanent items are partially shareable: other heroes can benefit from their effects when holding them, but cannot sell or upgrade them. 
Divine Rapier and 
Gem of True Sight are special, in that they drop on death and can also be used by enemies.
Finally, to prevent abuse, certain items are disabled on the 
Animal Courier.
Contents
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Details:
- Other than
Observer Wards and 
Sentry Wards, stacks of the same item type owned by different players do not merge.
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Details:
-
Bottles containing runes cannot be shared. - Divine Rapier is only shareable in that it can be picked up when its owner dies. It does not give its effect to allies if given to them while alive.
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Couriers can often make use of shareable items. Check out Courier#Inventory to see the specific interactions.
Cooldown interactions[edit]
- All Items of the same type in the user's inventory, backpack, and stash go on cooldown when any of them is used, independent of their owner or shareability.
- For example, if you have 2 stacks of
Dust of Appearance—one of your own and one of a teammate, using either one will put both on cooldown.
- For example, if you have 2 stacks of
- If a hero receives an item type which would be on cooldown for them, it is placed on cooldown, independent of its owner or shareability.
- For example, if you use your Dust of Appearance, then receive an unused stack of Dust from a teammate, both will be on cooldown.
- For example, if you use your
- An Item that is on cooldown retains its cooldown, even when given to a Hero that hasn't used it.
- For example, if a teammate uses one Dust of Appearance and gives the rest to you, it will be on cooldown for you too.
- For example, if a teammate uses one
- All items that merge into an existing stack of them will assume the same cooldown as the stack which was first in the inventory.
- For example: You buy a stack of Dust of Appearance and give it to a teammate, who uses it, then drops it.
- If you buy another stack of Dust before picking up the first Dust stack, the merged stack will not be on cooldown.
- However, if you pick up that first Dust, it will be on cooldown. Any additional Dust you buy will merge with that stack, and also be on cooldown.
- For example: You buy a stack of
Version history[edit]
- Items now have muted form when carried by non-owner (aside from a few exceptions like regeneration and leaver items). -pm can be used if you want to allow pooling in your games.
- Added a new mode -poolingmode(-pm) to allow pooling.
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