The Eleth Mixer has
slots that allows you to place any discovered
items within it, allowing you to cook food during battle by meeting certain criteria, whilst other
items are produced whilst you're wandering around, with the more valuable
items having less of a chance of
production.
Whenever the Eleth Mixer makes an
item, it will gain more eleth allowing it to create better
items and through the
production of certain
items you'll gain more
slots, allowing you to put more
items into it at once.