BioCap — Know Before You Pour.
With input from researchers, professors, and alumni at the following institutions.
Baxter
University of Chicago
Cornell University
Wharton · UPenn
We throw out good milk every day because we can't be sure.
Millions lost their sense of smell due to COVID-19 — making smell-based freshness checks unreliable for a large portion of the population.
Millions get sick every year from contaminated or spoiled food.
Sources: USDA Economic Research Service; peer-reviewed food science literature; survey of 20+ households.
Printed dates are a rough estimate — they never actually measure the milk in your carton.
Printed dates estimate freshness — they do not measure the milk itself.
Are people happy with using just the expiration date?
with relying only on expiration dates
BioCap provides a real-time freshness check — not a printed-date guess.
When the date isn't enough, most people fall back on smell — and that has its own limits.
Smell is subjective and unreliable — especially for anyone who has lost their sense of smell.
How do most households check milk today?
rely on smell to judge freshness
BioCap measures what is actually in the milk — conductivity, not guesswork.
I put my heart and soul into BioCap — from the first sketch to the final prototype, every iteration was driven by a simple belief: families deserve better than guessing.
Developing BioCap was never a solo effort. I was fortunate to receive input and scientific guidance from leading scientists and mentors across the nation, whose expertise helped turn questions into results and ideas into a device grounded in real research.
BioCap took first place at CIJE Innovation Day — proof that rigorous science, real-world problem solving, and years of dedication can come together in something people believe in.
BioCap received first place from The National Institute of Innovative Sciences — in recognition of outstanding creativity, innovation, and contribution to advancing science and improving lives.
We evaluated 4 approaches before selecting conductivity sensing as our solution.
| Approach | Accuracy | Cost | Portability | Selected |
|---|---|---|---|---|
| pH / Acid Strip | Medium | $$ | High | ✗ |
| Color / Visual Sensor | Low | $$$ | Medium | ✗ |
| Conductivity Sensing | High | $$ | High | ✓ |
As bacteria metabolize lactose they produce acids, releasing more mobile ions and measurably raising electrical conductivity — a precise, physics-based, non-invasive spoilage signal.
As milk spoils, bacterial metabolism produces acids such as lactic acid, increasing mobile ions in the liquid.
More free ions increase electrical conductivity, giving the system a measurable signal tied to spoilage.
The system establishes a fresh baseline, then measures delta conductivity to account for natural variation.
Fresh is below 150 µS/cm, borderline is 150–400 µS/cm, and spoiled is above 400 µS/cm.
Adjust the slider to change delta conductivity in microSiemens per centimeter. The cap compares that value to a fresh baseline and classifies the milk.
The delta conductivity is below 150 µS/cm, suggesting minimal bacterial activity.
The BioCap body was designed around a cap shape, clean grip texture, handle, and centered probe channel.
Real impact. Measurable change.
of milk discarded before it truly spoils — BioCap can recover that.
$2B+ in US dairy wasted annually — a massive market opportunity.
of surveyed users want a dedicated milk freshness device.
Would use the cap daily
Found LED readout intuitive
"A small cap. A big difference."