We Bare Bears Match3 Repairs frequently offers unlimited timed items, such as lives, power ups, and others to our players as rewards through events. Unlimited items are controlled by a timer and are indicated at the items that are in effect.
Because it's a time based item, the timer will countdown immediately after the item is claimed and if you stop playing after claiming the items, the items will continue to countdown and will expire and forfeited by the player. It's best to collect the item when you are ready to use it.
In some situations, players may be able to stack unlimited items and that would increase the time of those unlimited use of items within the extended time.