When was your LO regularly eating a half an cube? A full cube? 2 cubes? (per meal)

When were they eating a full pouch? I see that you can buy reuseable food pouches in different sizes. What sizes would I get the most use out of?

I read all the food safety information here: http://wholesomebabyfood.momtastic.com/
But what does that actually look like in reality...? If more than half of the food wasn't finish, would you refrigerate it and re-serve within an hour, etc?