Milk before bed

I need some serious insight on this. My baby is coming on 15 months and she still gets a bottle before bed. About 7oz of milk. She pretty much only drinks out of the munchkin straw cups for now but I have tried just about everything before that when dropping the day time bottles.

Do I need to start dropping milk completely before bed or I getting her to drink it out of something else? Do I give her less milk? I am so confused on this topic.

Please help this crazy first time mom! 😅