I use a combination of all. My Vegas collection is in airtites. I use to keep them in cardboard flips in a box, but I looked down into the box and saw some chips warped If it is a one time problem for me or an issue with the cardboard I don't know. But I put all my chips in airtites.

I keep my roulette chips in binders, but have been moving them to tubes.

I also use racks.
Barry