Sounds very similar to my nearly 14 month old
She drinks 600ml blue top (spread over 3 bottles).
She picks at her lunch and dinner and throws it about.
I spoon feed her breakfast to make sure she eats a decent amount.
She has lots of snacks during the day though.
Yoghurt covered raisins, rice crackers, pieces of fruit - I find if I put little bits and pieces in a small plastic container, she'll just nibble as she plays.
She does drink a LOT of water though.
She has 2 naps a day.
Both 90mins at least.
11-12 hours at night.