Bomb Cooler will add 5 more moves to all visible Candy Bombs to delay their explosion.This booster really helps if you are close to beating the level, but you have a bomb that is about to explode.
Bomb Cooler can be activated during gameplay only in levels with Candy Bombs and it re-appears when you fail a level because a Candy Bomb has exploded.
This is one of the boosters that you cannot get from the Daily Booster Wheel and the Sugar Track.
In the video below you can see Bomb Cooler in action: