plastic cap with a straw

Looking through the Dyson award list, wanted to comment some ideas:

https://www.jamesdysonaward.org/2018/project/sip/

SIP is an all-in-one product that merges a conventional paper cup, a straw, and a cap into one design reducing their environmental impact.

First of all even though paper is degradable, it has more mass = requires more energy to produce (don't forget you need to hold water). 

Second, there are starch plastics not only in 2018 award

https://www.jamesdysonaward.org/en-AU/2018/project/potato-plastic/

, but the whole lot of type of bioplastics (we just need to promote them more). 

https://en.wikipedia.org/wiki/Bioplastic

However, the design cap + straw is still useful to prevent small littering.  So, here is my improved solution:

Made of bioplastic, round shape (keep the form better), with glued to the wall half circle straw.  On top of the cap bend, the straw makes the full circle and makes a double bend with zigzag - origami common straw shape and then bends around on a half the rib of the cap ( zigzags are more frequent inside to bend in a circle).   On side of the cap, there is a bend in the wall to make a room for stacking caps together (the shift should be not symmetrical to make caps rotate on an angle to make the stuck more stable and locate more straws).