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 he can use, sell, or upgrade it. However, since consumables cannot be upgraded into other items and only grant temporary effects, they can be freely used by all other Heroes. This is important, since it means that support Heroes can purchase Sentry Wards or other consumables on a Courier and other Heroes can place 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. Divine Rapier is also partially shareable because of its unique mechanic.

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

Partially shareable items
Bottles filled with runes are not shareable.

Completely unsharable items

 * All recipes
 * Every item that requires a recipe except Flying Courier
 * Every item not noted above

Items disabled on Courier

 * due to Unholy Strength
 * due to True Sight
 * due to Transmute
 * due to Dominate
 * due to Hex
 * due to Arctic Blast

Note that Couriers are also unable to pick up the Aegis of the Immortal and dropped Divine Rapiers.