Flying on a 787 - gift for all the FAs?

When I fly for work, I usually buy a small gift for the FAs on my flight. They're domestic and short, so it's no problem to give something for all 4. I give it to the head FA when board.

I'm flying a 787 5+ hr flight with a group, so I think there will be anoint 9-10 FAs on the flight overall.

Should I get something for all 10? Can I give something for the ones in my section? When/how would I do that?