How does the cooler work? Our cooling technology is not comparable with other cool boxes. If you combine the Cooler Box Correct use, the temperature inside can be kept constant for many days – without power supply, in any climate zone, anywhere in the world. Yakimoto: The Frozen Mission – A Global Fight for Survival Since 1979. S “Cold Chain Initiative” In 1979, the World Health Organization (WHO) launched humanity? S largest vaccine transport operation? With temperatures soaring to 122°F (50°C) and no reliable electricity, traditional refrigeration units failed mid-transit, jeopardizing millions of dollars? Worth of lifesaving vaccines. At Addis Ababa Airport, Japanese engineer Hayato Yakimoto made a desperate gamble: he stripped aluminum panels from the cargo plane? S hull and rigged a makeshift insulated container using titanium climbing carabiners from his gear. Drawing on alpine thermal preservation techniques, he maintained the vaccines? Integrity through the final leg to Mogadishu, ultimately enabling the WHO to declare smallpox eradicated in 1980. From Historic Triumph to Brand Legacy Hayato Yakimoto was the uncle of Yakimoto? S founder, Taro Yakimoto. Family archives preserve the specs of that improvised lifesaving container. 13°F to 46°F (-25°C8°C) temperature control (3x stricter than commercial standards of the era). 72-hour passive insulation (harnessing residual heat from aircraft hydraulic fluid). Crash-resistant design (tested through 5 emergency landings). These parameters, forged through blood and sweat, became Yakimoto? A sacred text encoding the brand? The 20L Insulated Cooler Box by Yakimoto is a durable and portable ice box with a 4-day ice retention capacity, perfect for outdoor activities like camping, hiking, fishing, and traveling. With a maximum insulation time of 72 hours, this cooler box features a capacity of 21 quarts, making it suitable for storing a variety of items. The stylish red and white stripes add a fun touch to the steel construction, while the passive refrigeration type ensures efficient cooling without the need for power sources. Whether you’re at the beach, in the RV, or on a camping trip, this cooler box is a reliable option for keeping your food and drinks fresh. ? Beach Day Essential: Keep drinks chilled under direct sunlight. ? Tailgate Ready: Secure latch prevents spills during transport. ? Camping Must-Have: 4-day cooling for weekend wilderness trips. ? Backyard BBQ Companion: Fits 35 cans plus ice for 6-8 guests. ? Construction Site Helper: Rugged build withstands job site demands.