Hey momma's

Any suggestions on what I can use/put formula in so that I don't have to send the whole can to daycare? This lady is running through his milk too fast. Idk if she's putting too many scoops or overly feeding him But formula cost too much for that. I'm not with it.

Also I send water bottles, the water bottles never be touched. So I'm confused as to how the milk be damn near gone be the water bottles still be unopened? I would hope she not giving him tap water. Cus i'll spazz