deltaH Innovation lines up Brains Brewery to launch self-cooling can
Welsh start-up deltaH Innovation is commercialising Cool>Can, a self-cooling drinks can that uses a chemical process housed in a can-within-a-can format to cut beverage temperature by about 10-15C on activation. Brains Brewery will launch the first product, Bayside Welsh Lager in Cool>Can format, at London Packaging Week 2026, while deltaH reports interest from the US and Japan but intends to keep manufacturing in South Wales.
Why this mattersA working self-cooling can that fits existing filling lines could open a new premium-format category for canned beverages if it scales beyond a single regional launch.
- Brains' Bayside Welsh Lager will be the first beer using deltaH's Cool>Can self-cooling technology.
- The launch is scheduled for London Packaging Week 2026.
- Cool>Can uses a non-toxic chemical process in a can-within-a-can format, cutting drink temperature by approximately 10-15C on activation.
- deltaH has developed the technology for more than two years and runs a pilot production facility in Wales.
- deltaH reports interest from overseas markets including the United States and Japan but plans to keep manufacturing based in South Wales.
- The company is backed by a syndicate of Welsh investors as it moves toward commercial-scale production.
- DeltaH's patented cooling salt formula is named DC15.
- The company says DC15's chemistry meets UK REACH, EU REACH and FDA requirements.
- Founder James Vyse says filling-line and industry-scale integration, not the cooling chemistry, has been the main technical hurdle to commercialisation.