–50 to –15 °C controlled temperature hold — Maintains ultra-low temperatures for frozen vaccines, biologics, and sensitive payloads for 62+ hours without dry ice or electrical power PCM panel-based temperature control— Uses removable phase-change material panels, engineered for repeatable performance and easy conditioning in lab freezers Robust, compact design — Exterior ~11″ × 11″ × 11″ with payload space ~5.75″ x 5.75″ x5.75″; rugged exterior and dual carry / shoulder straps for field transport Compliance, reliability & reuse— No consumables like dry ice needed. Panels can be reused thousands of times, reducing waste and total use cost. Compliant with all current CDC recommendations. Lab & clinic integration — Validated system that is ideal for frozen vaccine outreach, specimen transport, mobile labs, or backup storage during power outages The Cool Cube 03 at Frozen Temperatures is not an ordinary transport cooler. It is an easy-to-carry, qualified container and pack-out system that keeps temperature sensitive product (varicella, MMRV, zoster, Fresh Frozen Plasma) frozen between -50° and -15°C for over 2.5 days – without using ice or electricity! This cooler is ideal for transport, but also excels at protecting valuable product during off-site use and power outages, regardless of hot conditions. The simple, validated, patented technology is the best compact thermal protection product available to maintain the cold chain!