Is she really having 200mls 7-8 times a day? Crikey! That must be expensive! And with two cups of water as well she'd be weeing heaps Lucky you're using cloth
Have you tried a straw cup? Natty has only just started with one and she likes it for the novelty value
Other thing I'd suggest is seeing if she'll have half cows milk half formula (only if you're concerned about the expense).
But maybe Kell is right and she needs more solids at meal times?
Otherwise, as you've first suggested, maybe she is just having a growth spurt and she'll get through it soon... I guess you'll know in a week or so