Cherub Baby ExpressWarm Portable Warmer & Steriliser warm, sterilises and boils all from one compact cordless unit. The Cherub Baby ExpressWarm Portable Warmer & Steriliser is designed to make feeding at home, overnight or on-the-go faster and easier. ExpressWarm can warm milk or water, boil water and sterilise. ExpressWarm can warm 120mL from room temperature to 37°C in as little as 90 seconds, while the adjustable temperature control lets you select anywhere from 37°C to 100°C. It also has a generous 500mL capacity.