Liquid Diet

So Sienna has been on a mostly liquid diet for about a month.  She doesn't really have any interest in her baby food or any food that doesn't involve a bottle, puffs or mum mums.  We have tried everything and we hate wasting food on stuff she doesn't like.  Any ideas of what to do?  Or is best to just wait it out until she starts to eat?  I hope she starts to eat more soon...formula is expensive!