I use less than the 3oz travel sizes for a 10 day trip for me. The 3 kids use about a 3 oz (2 boys, 1 girl) and hubby uses very little

. I take 2 travel size toothpaste (1 kid, 1 adult and that is plenty) Sunscreen- I pack the high spf stuff (it comes in smaller tubes, but is expensive so i buy on sale w/ coupons), I also pack a sunscreen stick. I pick up a bottle of the "regular stuff" when I get there but I always have too much

and I just throw it out. I take face lotion for me (1 oz) but i generally find that suncreen works as a "lotion" as well and I don't need both. I pare my make up to almost nothing...I get a little tan so I have that ''sun-kissed look"

besides it just melts off. Must have an anti frizz hair product just to control the frizzies a bit.
We have 5 travelers so we can have 5 qt zippies for the flight. I don't think we have every used the 5 and never had a problem, I probally could repack sunsreen into 3 oz containers, but it's just as easy for us to buy the one big bottle.
I found I dont need as much as I thought I did and most stuff I can live without.