Self-warming Feeding System | Yoomi

: As the baby sucks, the milk flows over the channels of the warmer, heating up just as it enters the teat.

: No batteries, no cords, and no searching for a cafe with a microwave. Yoomi Self-Warming Feeding System

: A plastic disc filled with a non-toxic concentrated salt solution. : As the baby sucks, the milk flows

: Place it in an electric steam sterilizer for roughly 30 minutes. : As the baby sucks

Specific regarding the "weight" of the bottle when the warmer is inside?