Kiinde Kozii bottle/breast milk/food jar warmer. I have two. One was used for about 6 months and one was used for maybe half that time. Our kids were fine with room temperature, so we stopped using them. $35/each, pick up in South San Jose by Cottle.
Here is the description from Buy Buy Baby's website:
Kozii™ uses a low temperature, nutrient-safe water bath that is safe for all types of bottles and bags.
This lets you warm meals without exposing bags and bottles to dangerous steam, hot/boiling water ...