The Avent Express Bottle Warmer is suitable for all types of feeding bottles and has an easy to use bowl for keeping food warm. The bottle warmer is a convenient way of preparing your baby's bottle or food in the kitchen or at the bedside.Warms quickly and evenly. Gently heats in 4 minutes. The Avent Express Bottle Warmer is suitable for all types of feeding bottles and has an easy to use bowl for keeping food warm. The bottle warmer is a convenient way of preparing your baby¡Çs bottle or food in the kitchen or at the bedside.