Entangled Chalice
When you have as much experience as I have with infusing items with Blood, you will notice that by enhancing a tear of the fearsome Ghast will result in a very special kind of tear. It seems to share all properties when split in half. This gave me the idea to build §lEntangled Chalices§0 with this tear with the goal of sharing the fluid contents of the chalice with all other chalices that are constructed from the same tear.
Normally, you will get two chalices sharing contents from the crafting recipe, but when replacing the center Gold Ingot in the recipe with an existing chalice, it will expand the tear network to include another chalice.
These chalices can be placed in the world or held in your inventory. Shift + right-click with it in your hand to enable the Omni-Supply mode which will continuously try to fill all containers in your inventory with Blood.