This is a bit to see on of the possibilities of these kind of interlocking fold with curves. However it is not an easy fold or to design nor easy to fold it together. The paper went all wrinkly and also might been because I made some too hard round corners on this design. However I know there are straight fold versions of this kind of designs that are easy to fold together. But it is still a very interesting design that looks like someone just twisted a rectangle in 2 places.

An interesting fact I am looking at allot of times seem most curved fold can be done with a straight fold and the straight ones are often easier folded in most cases. But still it is very interesting to see what future possibilities there will be using curved folds in packaging.