The Water Blob… A Step Closer to Sustainability

Short videos showing a small, clear capsule filled with water have circulated online for years. Someone bites into it, takes a few sips, and moves on. No bottle, no plastic cup left behind. For a while, it looked like another clever visual meant to grab attention. Many people assumed it was artificial or staged.

It is not.

The capsule exists. It has been tested, deployed, and measured. It addresses a clear problem and has already produced results.

The product most people refer to as the “water blob” is called Ooho. It is a small capsule made from seaweed-based material and designed to hold drinking water. The outer layer is edible. If it is not eaten, it is designed to break down naturally rather than persist in the environment like plastic.

The idea began in 2013. It was developed by Rodrigo García González together with collaborators during academic research in London. Early reporting by established media outlets documented the prototype and its intent. Over time, the work moved beyond experimentation and became part of Notpla, a company focused on replacing fossil-based single-use packaging with natural alternatives.

The capsule is created by forming a thin membrane around liquid using seaweed extracts. The process itself is less important than the outcome. If consumed, nothing remains. If discarded, the material biodegrades. It does not fragment into long-lasting debris or contribute to microplastic pollution.

Each capsule holds a small amount of water. The typical volume ranges from 20 to 30 milliliters, with an average of about 25 milliliters. It is just about one large sip. In comparison, a small plastic event cup usually holds 200 to 250 milliliters, which is equivalent to about eight to ten capsules. A 500 ml. plastic bottle is roughly sixteen to twenty-five capsules. A one-liter bottle would require more than thirty capsules.

This difference is intentional. The capsule was not designed to replace refillable bottles or provide long-term hydration. It was designed for moments when people only want a few sips. These are the moments when bottles and cups are often used once and discarded half-full.

That context explains where the capsule works best. Large events, races, festivals, and public venues generate large volumes of single-use plastic in a short time. Even when recycling systems are in place, collection rates are often low and contamination is common. Small, biodegradable portions reduce the risk of plastic entering surrounding environments, including rivers and coastal areas.

The concept has moved beyond theory. Seaweed-based packaging developed by Notpla has been used at real events and food venues. The company has also expanded into other packaging formats, including food containers and takeaway packaging, using the same material approach.

More than 30 million single-use plastic items have already been replaced. Independent reporting indicates that over 21 million of these replacements occurred in Europe. In 2023 alone, approximately 4.4 million plastic units were replaced. These were associated with an estimated avoidance of 8.5 tonnes of plastic waste and around 250 tonnes of carbon dioxide-equivalent emissions.

These figures do not suggest that plastic pollution has been solved. They do show that the approach has moved beyond pilot stages and into repeated, measurable use.

Cost is often raised as a concern, and it matters. Reported average costs at scale place each capsule at approximately £0.02 to £0.05 per unit. Event-grade plastic cups typically cost between £0.01 and £0.03. Wholesale 500-milliliter plastic bottles range from about £0.05 to £0.15 per unit.

On a volume basis, the capsule is not cheaper. Its value lies elsewhere. It reduces cleanup costs, lowers environmental risk, and avoids long-term waste that is difficult and expensive to manage once it escapes collection systems.

Material choice adds another layer. Seaweed grows without farmland, irrigation, or synthetic fertilizers. When responsibly sourced, it places less pressure on land and freshwater systems than many alternatives. This is relevant in a world facing increasing resource constraints.

Taken together, these features align closely with several United Nations sustainability priorities. They support responsible consumption and production by reducing single-use waste. They contribute to climate action through avoided emissions. They also help protect marine ecosystems by reducing plastic leakage at the source.

The limitations of the capsule are clear. It is not resealable. It is not designed for storage or transport over long periods. It does not replace refillable bottles for daily use. These constraints define its role rather than weaken its value.

Sustainability progress rarely comes from one product that replaces everything else. It usually comes from many targeted changes that reduce harm in places where systems struggle the most.

This is where the water capsule matters. It does not promise a permanent fix. It shows how rethinking materials and scale can reduce risk in high-waste environments. Sometimes thinking small can reduce environmental risk where waste systems struggle.

The developer behind the capsule has stated an ambition to replace one billion single-use plastic items by 2030 across all product lines. Reaching the target will depend on production capacity, adoption, and integration into existing distribution systems.

What is already clear is that the idea is no longer speculative. The technology exists, and the impact is measurable. The use cases are known. It offers a practical option for reducing plastic.

And when the problem is visible, persistent, and growing, small steps taken early tend to matter more than large promises made later.

Sources and References

1. Notpla, official website and impact reporting: https://www.notpla.com
2. Smithsonian Magazine (2014). Here’s a Water Bottle You Can Actually Eat https://www.smithsonianmag.com/innovation/heres-water-bottle-you-can-actually-eat-180951102/
3. ABC News (2014). Want to Save the Environment? Eat This Water Bottle https://abcnews.go.com/Technology/water-bottle-eat/story? id=23576885
4. Fast Company (2020). This edible blob filled with water means you don’t need a plastic bottle https://www.fastcompany.com/90464695/this-edible-blob-filled-with-water-means-you-dont-need-a-plastic-bottle
5. The Earthshot Prize (2022). Notpla winner profile: https://earthshotprize.org/winners-finalists/notpla/
6. EIT Food (2025). Notpla: Turning the tide on single-use plastic https://www.eitfood.eu/impact-stories/notpla-turning-the-tide-on-single-use-plastic