The Tepe Company in Malmo, Sweden, sells a variety of oral hygiene products, including dental floss.
They did a series of floss ads in conjunction with a Turkish ad agency, TBWA.
Short review: Love the designs, lose the teeth.
You can weave a pattern with any circle of pins, so take some floss and try this at home.
No need to lay out a wierd set of teeth to hold the floss.