Image top left- Further rinsing system development. Mock-ups two and three were produced, again utilising a neo-pixel ring but beginning to take shape with cuts being added for an activation switch. Original cups were designed to fit the standard disposable lids, it was decided that sharing the same diameter lip would result in non-authorised cups being placed onto the rinsing unit.
The decision was taken to create a unique edge to the cup to address this problem. Different size cups were also considered at this stage (large and medium), but was decided that a large cup would allow for any size of beverage to be purchased.
Image top right- reusable cup development. Early reusable cup concepts used the standard 90 degree edge on the inside surface when transitioning to the wall. When used with my rinsing unit, this would likely result in the water not being able to efficiently rinse all surfaces.
Also, over time, stains were beginning to appear in the edges of my reusable cup (which I was using daily for research). This was addressed this through creating a single surface on the inside of the cup, this allowed for the water to glide across all surfaces with ease, but also addressed issues regarding the stained edge.
During development, the cup became heavily weighted towards the lower of the cup. Excess material was removed to create a cavity, this removed weight from the cup and potentially maintained the drinks temperature, as the base of the cup is where the most heat loss occurs when it is placed on a surface.
Image bottom left- Further reusable cup development. To manufacture the cup for commercial application, the structure cannot be moulded in a single piece. This led to the development of a two part construction. Because the cup is manufactured in two parts, it opened up possibilities to vary the material of the inside of the cup from the outside of the cup.
The inside was decided to be a HDPE injection mould, which would then be placed within an anodised aluminium outer. The aluminium was chosen due to its recycling properties, but also its lightweight nature. The entire cup could not be produced from aluminium because of the heat transfer.
Image bottom right- Development of the innards of the cleaning unit. Perforations were added to the rear to allow for water delivery/ejection and power. Due to the rinsing system ejecting water, a physical push button to activate the unit could potentially allow water inside and cause the machine to fail.
It was decided that a seamless surface would be required and research was conducted into capacitive touch. Gauges were produced to assess the optimal fit and position for the capacitive touch sensor.
Tests were also undertaken with fitting a centrifugal fan to potentially dry the cup post rinsing cycle, forcing the moisture out of the cup and into a wet chamber ready for ejection.