Sure, it's not a microwave or kettle, it heats weaker and slower
and we must organize a minimum (start preparing about 30 min before meal).
But this is an excellent adjunct for travel. We use rando where we could give our baby potty in the woods !!!! The jar was at the right temperature (after 30min heating)
The operation of the gel pack is greatly improved by the isothermal bag. The set is a bit heavy.
We loved it and we'll be able to continue the hike and walks with our little piece!