Oslo Norway – August 21, 2025 – Oyster, the Norwegian thermal technology company redefining portable cooling, today announced the launch of Cryo Blocks, a new innovation designed to push the limits of the Oyster cooler.
First released in 2023 following six years of research and development, the Oyster cooler has already set a new standard for high-performance, non-electric cooling. With Cryo Blocks, that capability now extends to sub-freezing temperatures as low as –12°C (10°F), enabling safe storage of ice cream, frozen foods, and even temperature-sensitive medicine, without electricity or dry ice.
Unlike conventional ice packs, Cryo Blocks work in tandem with Oyster’s proprietary DLTA thermal technology, unlocking performance previously unseen in portable coolers. This advancement positions the Oyster cooler as one of the coldest and most extreme portable solutions on the market.
“Cryo Blocks demonstrate what the Oyster platform was engineered to achieve,” said Ian Sandmæl, Co-Founder and Chief Design Officer at Oyster Thermal.
“By combining advanced materials science with practical design, we’re expanding what people can expect from a portable cooler, whether for outdoor adventure, field research, or emergency preparedness.”
