Quantum Gum is a gum in Bubble Gum Simulator. It can be obtained by purchasing the Infinite Size gamepass for 749 
. It has the highest capacity (infinite) of any gum.
Trivia
- This also grants the user a sell button, allowing the user to instantly sell their bubble at any time.
- If you press the sell button in any world that does not have a sell area, you will teleport to the one in the Starter Area, but the ground won't be loaded and you will fall to your death.
- This is one of the only 4 gums that doesn't have the word "gum" on the decal, the others being Experiment 54, Experiment 32, Radioactive Gum, and Alien Gum.
- This is one of only two gums that can be purchased outside the Gum Stores. The other is VIP Gum. They are both packaged with gamepasses.