Answer:
What ship has no captain but two mates?
What can you keep after giving it to someone?
You can break it or drink water from it.
You fill it and it empties, A metaphor for plenty, Depending on what half you see, It's either full or empty
A squiggly line tells you when you've done it wrong
What can you lose that will cause other people to lose theirs too?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?