These chopsticks really can be taken anywhere (perhaps not in your hand luggage though).
Handy to have on your person whether you use them to replace your knife and fork, to practise precision for your next game of operation, or for waking up your tentmate with a tweak of the nose.
Origin: China
Hands down our favourite are the utterly bonkers (and awesomely-named) Miyagi chopsticks which weigh a mere seven grams each