Hi, you've mentioned having sippey cup issues with your LO. My son
hasn't done well with sippey cups that had WCM in them but would drink
water kind of ok from one.
When I would give him WCM he would scream and
throw the cup down or hold the cup upside down and let the WCM run out
of the spout and all down his body. He would laugh and think it was
hilarious while doing this.
I thought I had purchased every brand of sippey cups but realized I had tried Tommee Tippee truly spill proof cups and bought at 2 pack from Target yesterday. My son did better with these cups, they have a valve in them and he has to work/suck a little to get WCM out of it. Although he did let milk run out of his mouth and down his shirt because that is just fun....WTF....
I wanted to share in case you haven't tried this one yet. http://www.tommeetippee.us/product/truly-spill-proof-spout-cup/