You can always rely on the Japanese design firm Nendo to come up with fresh ideas. We've previously featured their cylindrical computer mouse, their climbing wall inspired by Alice in Wonderland and their edible craft supplies.
More recently, Nendo has been experimenting with chopstick designs. Its new line is designed to fit a pair into a complete form.
The top 2 photos show a design called rassen, which means helix. It's a reference to the structure of DNA. The bottom design has built-in magnets to keep the chopsticks together when not in use.
You can view more photos here.