this, this and this. It's an ideal way to carry around a pair of re-usable chopsticks so you can avoid having to use the disposable ones that are the usual cutlery choice in many Chinese restaurants. (Many disposable chopsticks are made from the products of forest destruction, though to be fair some are made from waste wood from the construction industry). There's a slightly odd article here about how taking your own chopsticks can help save the environment, which gives you some idea of the scale of the problesm caused by disposable chopsticks.
Crafty Green Poet Etsy shop so yesterday I added this one to the shop here.
(After a very slow start, my Etsy shop is now going quite well, with steady sales. It's still a very small shop though and very varied.)
As ever, red text in this post contains hyperlinks which take you to other webpages where you can find out more.