Nobody gives it to them. 5-year-olds have sufficient intelligence and dexterity to get into all kinds of things, but don't necessarily know not to eat/drink/play with it, etc.
I'm somewhat of a lush and the idea of drinking two shots of 190 proof ethanol sounds like an excellent way to purge my stomach. I'd be impressed by any baby who could keep that down even if they got past the rank stench. Any baby that extreme would almost certainly survive.