Coin tubes for Philharmonics?

So a while back I bought 10 Austrian Philharmonics. Now I'm buying 10 more to fill up a tube... but I have no tube for them.

Online, they seem to be $5 - $10 (after shipping), just for a stinking plastic tube. Right now I have them wrapped in foam in a ziplock bag with a dessicant. Not really ideal for storage, IMO.

Any suggestions? Can't figure out what the cheap option is here (other than what I'm already doing).