A person is holding a syringe that is numbered from 0 to 6.
Glasses with a device that has clear liquid in it that reads 2.
A case filled with red fluid in it and numbers on it.
A device with a syringe attached to the side with markings that goe from -6 all the way to +6
A syringe's red plunger is situated between the 3 and the 5 on the scale on the side.