I wouldnt go back to a baby bottle at this stage, as most will be getting them off them soon. My girls never had a bottle either, but uses a straw cup to drink water so ill be putting milk in that and seeing how it goes, and then eventually an open cup x
You’re not supposed to use a bottle past one, so I wouldn’t bother trying to get one for using for a month at the most.
This lady on tik tok ( health visitor) has done quite a few posts about it. And I’ve just seen another - might be helpful https://vm.tiktok.com/ZNdRP9p74/
My first is the only one to have gone to childcare and it was only 2/3 days a week but she never dropped feeds so was like a newborn if I was around. But she wouldn’t take a milk unless it was directly from me so she just had solids till I came back. My 2nd and 3rd could take a bottle and dropped feeds but theyre always with me 🙄
You best bet is whatever you use for water - sippy/straw. Or look into the honey bear straw bottles as you can gently squeeze them to help I think