The Magic Bullet is perfect for this. You blend it in the cup, and then if you have leftovers, just screw a lid on the bullet and store it in the fridge (if you pureed a lot of food and you're not going to use the leftovers within a day, I recommend dishing out what you are going to use into a bowl right after you make it and store the rest in the bullet in the fridge, since you don't want to contaminate the leftover food with the saliva bacteria). What I would often do is scoop whatever I was making for dinner into the bullet and feed it to our baby, so she ate what we were eating. If it was before she could eat dairy, then I would just scoop out the food (soup, pasta, etc) before I added cheese or milk to it or whatever ingredients she wasn't old enough for yet. It made feeding baby super cheap and easy, and freshly cooked food/veggies are MUCH healthier and tastier.
For large batches I would use a blender (the Magic Bullet comes with a blender too) and freeze the baby food in an ice cube tray and then put in freezer ziplocks. At breakfast I could easily put 2 or 3 cubes in a bowl to thaw for lunch or dinner, or microwave if I didn't plan ahead.