Jimbo..In the past years I've brought two 2qt. pop bottles filled with 1 white & 1 red. I empty two 7up plastic bottles rinsed out & fill them up. they will weight approx. 5lbs. each. The reason I use them is they can't see what's in them cause they're green. I've see way too many people get their liquor taken out of their luggage by security at check-in. I've never had my 7up bottles taken even after they see them & I've flown are airlines going there..so it's not just a particular one. Remember the 50lb weight limit though.