Go to Ebay.com or Amazon.

1-2-3stitch.com has all sorts of goodies. Go to "necessities" and you'll see the craft organizer and storage bins. They are my favorite way of storing floss. I've also bought them at Hobby Lobby but have noticed that they rarely have more than one or two in stock. Could just be out store. I dislike shopping to begin with so ordering is my preferred way to go. Amazon might be another option. I have the Prime membership and rarely pay for postage.
Good luck.

texas thanks so much for suggestions

I use a fishing tackle box! It's deep and is the exact length of the floss.. I have another standard DMC box to keep the floss I'm using...

thamks loads people and never rhot of a tackle box.