It’s called Elasty and it was created by designer Yoori Koo. It’s a silicone bumper fitted with elastic strips which allow you to stash your headphones, pens, cards etc. on the back of the phone. smart!
iTwin: a double-sided thumb drive that splits apart in the middle; plug one half into one computer and the other into the second and instantly you can drag and drop files from place to place. SO getting one of these!! Genius.