Teleported bread is an item on Minecraft Online, which is obtained when you teleport with bread in your inventory.
When you do so, your bread will be transformed into "Teleported Bread."
You can see how Teleported bread looks like in the inventory on the right
When you create Teleported Bread for the first time you get the "Teleport Bread" achievement.
If eaten, the bread gives a nausea effect as seen on the 2nd screenshot on the right, and also gives the achievement "Yummy Bread."
- Teleported Bread is a reference to the Team Fortress 2 animation "Expiration Date"
- Teleported Bread lists who teleported the bread in the item description, which makes it an easy and inexpensive way to get a collectable of another player
- This feauture was added in the 1.12.2 update