After 1-2 months, dear daughter should be ready to take porridge, use a blender will be better. I use a philips hand held, cheap and good. 1/4 cup is enough, boil, blend, and boil again. Throw in veg like carrots and chicken. BUT, use only 1 item at a time, so that you know what dear daughter like, respond to and perhaps allergy is easy to identify immediately. Untill all single items are "tested", then you can rojak them.
We never use any jar food since. But it seems handy when you are outside. Nevertheless, you can invest in good thermo flask and bring along porridge.