Here you see my submission for the Esso-Design Challenge. It's a electrolysis device using both Red Bull cans as the electrodes and a hose as an connection between the two cans. The top parts have two functions: First they are supposed to seal the cans so no gas can get out except through the hose adapter at the top. Secondly there's a small hole in the middle through which you can establish a connection to a power supply.
The lower parts are there to connect the cans together via a hose.
It all is held together by a small printed piece between the top parts and a threaded rod between the lower parts which can be tightened together by a nut.
If a current flows, you are able to split water in its two components: oxygen and hydrogen.
Hope you guys have fun with it and it will fuel your innovative spirit.