Miracle 360 cup tips

I just read on Feeding Littles that the Munchkin miracle 360 cup is also bad for teeth/speech development. This is so frustrating, everything is bad, it’s hard to make choices nowadays 😩 anyway I’m sticking with my choice since I had just bought two cups hoping to help my daughter transition from bottles.

I wanted to know how you guys taught your kids to drink from it as my daughter is having a hard time understanding how it works. She thinks it’s a chew toy. I already showed her the water inside the cup, got her to drink a little bit without the rubber part of the lid... it took her months to understand how a trainer sippy cup worked so I’m clearly not a good teacher lol does anybody have any tips? Thanks !