Use 'leaky' to describe tangible items like containers or systems that let something through unexpectedly. My water bottle is leaky; it’s dripping all over my bag.
Pro Tip 2/3
Implies Damage
'Leaky' often implies that an object is damaged and needs repair to function properly again. The plumber is here to fix the leaky radiator.
Pro Tip 3/3
Negative Connotation
The term 'leaky' usually carries a negative connotation, indicating a problem or a deficiency. They got a leaky tent, and the rain ruined their camping trip.