Mealink is a conceptual system designed to help older adults maintain food safety and independence through a connected ecosystem of household devices and community support. The system combines a smart fridge, an automated composter, and a neighbourhood network to encourage sustainable habits and mindful consumption while reducing food waste at home. By bridging technology and everyday behaviour, Mealink aims to make food management safer, simpler, and more empowering for older adults.
Through primary and secondary research, we discovered that many older adults do not perceive themselves as struggling with food safety, yet their daily habits suggest otherwise. In most cases, they tend to store food that has already spoiled or passed its expiry date instead of throwing it away. Some struggle to read small expiry labels, while others forget where certain items are stored or how long they have been kept.
This behaviour often stems from habits formed when they were younger and had limited access to food, leading to a reluctance to waste it. While some occasionally consume food that has gone bad or turned sour and become unwell, the greater concern lies in their hesitation to discard spoiled food. As long as it remains in the fridge, there is no guarantee it will not be eaten later.
The challenge was: Design a system that encourages safe food practices while respecting older adults’ sense of independence and emotional connection to food.
Guided by the project’s objectives, our team followed a human-centred design approach that involved early research, iterative prototyping, and user validation.
Research and insight gathering
We conducted interviews with older adults, including our grandparents, to understand their attitudes toward food management, waste, and safety. Insights revealed that emotional attachment and the value of thrift often outweighed rational food safety decisions.
Ideation and concept development
Building on these insights, our direction focused on influencing behaviour without forcing change. Instead of telling older adults to throw food away, we aimed to reframe the act into something positive. Throwing spoiled food into a composter was positioned as recycling to nourish their own gardens, while exchanging almost expired food with neighbours became an act of helping others and being a responsible member of the community. This thinking shaped a three-part system that merges technology with daily routines in a natural and empowering way.
Prototyping and testing
I led the concept and development of the automated composter, from early sketches to coding the interactive facial-expression interface using HTML, CSS, JavaScript, and React. Together with two teammates, we built the physical prototype, while others developed the smart fridge interface and community visuals.
Usability testing at the Balwyn Evergreen Centre provided valuable feedback on the system’s clarity, accessibility, and emotional appeal.
Mealink’s solution integrates three core components that work together as a connected ecosystem designed to make food management safer, smarter, and more sustainable for older adults.
Smart Fridge
The smart fridge detects expiry dates, suggests recipes, and connects users to local community services through an embedded helpline. It also allows users to decide whether they want to give away products that are close to expiry. If another resident accepts, the exchange is handled through community-coordinated drone delivery, helping reduce food waste while fostering social connection.
Automated Composter
The automated composter identifies compostable waste and communicates through expressive facial animations that respond to user actions. These interactions turn food disposal into a simple and encouraging activity, teaching users what can be composted through playful feedback. It also features a physical button for automatic cleaning, allowing users to maintain hygiene with minimal effort. Its sealed pipe system automatically transfers compost to the garden, reducing physical strain and eliminating odours, an essential consideration for older users.
Community Network
The community network acts as the foundation of the system, offering setup assistance, grocery delivery by drone or in person, and facilitating local food exchanges. By bridging digital and physical support, the network ensures that older adults can stay independent while remaining connected to those around them.
Smart fridge screens
Automated composter
Composter face interaction
How to interact?
Move your cursor or finger on mobile to simulate body movement. The bin follows your motion with facial expressions. Move upward to see it open its mouth for compostable food, or press the red button to show a cross when the item is non-compostable.
User testing &
insights
During usability testing with older adults at the Balwyn Evergreen Centre, feedback was highly positive. Participants described the composter’s facial expressions as friendly and intuitive, saying it made the interaction “encouraging rather than instructive.” One participant noted it made composting “feel like a conversation,” while others appreciated the smart fridge’s subtle, non-intrusive reminders.
The centre’s CEO mentioned she would consider having the composter at the facility, recognising its potential as a community asset. Reviewers also praised the food exchange feature for turning the act of giving away nearly expired food into a socially positive behaviour that reduced waste and fostered connection.
Feedback from both the elderly participants and industry reviewers suggested several refinements, including clearer text or icons, a sealed composter system to prevent odours and pests, and private sharing options for family members to view fridge updates. Some reviewers also recommended adjusting the composter’s visual design to better fit different home interiors and expanding detection capabilities to include everyday items like cups or packaging.
Reflection
Mealink taught me that designing for older adults requires sensitivity to emotional context, not just physical accessibility. Subtle cues in colour, tone, and expression can shape whether technology feels empowering or patronising. I also realised that design is not always about simplifying tasks but about removing unnecessary steps, so users can achieve the same outcome with less effort and decision-making.
If revisited, I would refine the composter’s visual design for broader aesthetic compatibility, strengthen the sealed system to improve hygiene, and expand food exchange features for trusted family sharing.
Ultimately, Mealink represents how thoughtful design can reframe everyday routines, turning waste reduction and food safety into moments of independence, confidence, and connection.