Recently I wanted to make some knitted napkin rings as a gift and looked for a way to 1. keep their shape and 2. make them washable.
And I really found a solution which is also great for making bangles ;-)): use a core of recycled plastic bottle and a knitted or crocheted all over cover.

Check out my blog entry to see how easy it is to make a knitted (or even crocheted ;-)) bangle or napkin ring.

To find more patterns you can knit/crochet around your bangle or napkin ring check out the ravelry bangle patterns and/or the ravelry napkin ring patterns.

A friend (who is not member of ravelry) allowed me to show her bangle to show how most beautiful it looks with a simple cable pattern.

Du kannst die Anleitung in meinem Blog auch auf deutsch finden.