Item sharing

As a rule, items in Dota 2 cannot be shared with other heroes. The purchasing hero is considered the owner of the item and only they can use, sell, or upgrade it. However, since consumables cannot be upgraded into other items and only grant temporary effects, almost all consumables can be freely used by all other heroes. This is important, since it means that support heroes can purchase s or other consumables on a courier and other heroes can use them.

Other permanent but inexpensive items that grant regenerative abilities are considered partially shareable. This means that other heroes can pick them up and benefit from the effect of the item, but cannot sell or upgrade the item. is also partially shareable because of its unique mechanic.

Finally, certain items have disabled abilities when placed on the, to prevent abuse.

Partially shareable items
1 1 Bottles containing runes cannot be shared. Otherwise they are completely shareable.

Items disabled on couriers

 * Like allies, only shareable items work for the courier. This means non-shareable items are muted on them. Additionally the shareable items, , and  are disabled.
 * Couriers are also unable to pick up the and dropped s.
 * is not muted, but requires mana, so the courier cannot cast it.
 * ,, , , and  are fully usable by the courier.

Cooldown interactions
Examples: A 10 Second BKB can be on cooldown if given to somebody that has BKB on cooldown. If you pick up your own dust that has been used by somebody else, it will be on cooldown. If you have an unused stack of dust in your inventory before picking up your own dust(used by somebody else) none of it will be on cooldown. If you pick up your own Dust that has been used by somebody else.(without having dust in your inventory) And then buy more dust, all of it will be on cooldown.
 * On usage, all Items from the same type in the users inventory, backpack, and stash go on cooldown. Independend of their owner or wether they are shareable.
 * If a hero receives an item type which would be on cooldown for him, it is placed on cooldown. Independend of their owner or wether they are shareable.
 * If you give an Item that is on cooldown to a Hero that shouldn't have it on cooldown, it will still be on cooldown.
 * If a Hero didn't use an item in the last cooldown period. All items that merge into an existing Stack will assume the same Cooldown as the stack which was in the inventory first on pickup.