From: Tenkara Path
I thought this was so cool I figured I'd just repost it. I was wandering around tenkara sites this AM and stumbled upon the Tenkara Talk forum about DIY line holders.
He uses these "go tubs." If you look at TP's page or closely at the pic below, you can see there is a ridge where you can wind your line. The center container hold whatever you want. The larges one can hold tippet.
Tenkara Path shows it in action at his page here.