Yes. If you just rely on the functions of the Instant Pot, Ninja Foodi, you won’t know if the temperature of the milk reached the optimal number. Therefore, using a thermometer, will let you know and if you want to continue to heat the milk more, you have the knowledge. There ...
A few do ice cream. For about $100.00, one could get a thermal cooker (I recommend Saratoga Jacks) and have an ideal yogurt maker, a slow cooker, and even a cooler (the insulating properties keeps cold food cold). AND it is ideal to use for emergency use when your home loses power...