Bottles 🤷🏾‍♀️

Jasmine

So here’s my current issue....(seems like i have a new one everyday 😂) pedi told me to start giving my month old rice cereal because she wanted way more milk than she should’ve at 3 weeks and it was aggravating her newborn mucus. It’s solved that problem but now idk what bottles to use. The milk is too thick for the little bottle’s (5oz) nippl. I’ve tried to cut the nipple holes bigger but that made the flow too quick then i went up a bottle size but it still takes her almost 45mins to eat. Are there any bottles that’ll help or am i doing something wrong??? 😕🤷🏾‍♀️