Introducing bottles

Pen • 8/17 🌈👧🏼 | 11/19 🌈👦🏼| 👨‍👩‍👧‍👦

When are/did you introduce bottles if you're exclusively breastfeeding? I want to make sure my baby will take them in case I am not able to be with her constantly to breastfeed, so I'm planning to give her maybe one or two small bottles a day once we introduce them. My baby is just over 3 weeks old and I had read 3-4 weeks was kinda the sweet spot to introduce but I'm curious about others' experiences. Thanks!