I need help with toddler!

So my daughter just isnt having it with her drinking her bottle by herself. She can hold the bottle pretty well to play with it and make a milk mess everywhere but when it comes to her drinking from her bottle by herself is a no go. She wont do it unless someone holds it for her 😑😑.

Can I get some ideas on how to help my daughter (15 months) to get her to hold her bottle by herself now?