sippy for breast fed baby

Brittany • Mommy to a wonderful 12yr old boy, 9yr old boy 7yr old girl 6yr old girl and 3yr old girl. Due March 11th 2023 with a boy.
My LO is 23wks and I want to introduce a sippy. She is breast fed and has never had a bottle. We tried tommy tippy but the mouth parts too hard so she just chews on it. Anyone that has been through this have a good one I can try?