prototype 18

-Variant of 'the spring' of prototype 10 and 15: System to determine electrically if there's still water in the bowl

-Better stability, more reliable 'spring-system'

-Makes use of a PVC-tube piston with resilient material, some 'silicone molds' here. (Variant of spring, prototype 17)

Expected +:More reliable 'spring system'

                    Better stability

Expected -:Too weak resilience

Tested +: Better stability

Tested -: ?

user experience: /

designer experience: