Following as my daughter is the same, refuses bottles (tried 6 brands over the months), sippy cups (tried 3), open cups (tried 3). She’ll have water from a sippy cup but refuses breast milk or formula. Like you I’ll be back at work just before 1, I’m super anxious 😬
You could try a cup but you also don’t have to stop. You can continue to breastfeed even when back at work. Don’t know if you’ve considered that or not?
What do you think about offering it in a sippy cup or a strawed cup?