Get unlimited boosters ♾️ as a reward for completing stages in different events.
You can get the following unlimited boosters: a Bucket of Candy, a Can of Soda + a Bag of Chips, and Double Spinning Tops.

Unlimited boosters are marked with an infinity sign and a timer.
You can use unlimited boosters on every level until the timer runs out.
If you get two unlimited boosters of the same type, their timers will be added together.

If you get a regular booster while an unlimited booster of the same type is active, then it will be added to your total of boosters.