S.H.
**Adding this:
I just had another idea.
Since your baby is so young, and you are needing to transition her to a bottle for feedings due to your return to work... I have had some friends, in which their newborn did not switch to a bottle... so, thus, they used syringes to feed their baby. A syringe is something a baby can 'suck' on to 'nurse' and her intake might be better with this approach. You can get the 'syringes' from a pharmacy or drug store... those big sized type syringes that is used to take cough syrup from, for example.
Versus, with a bottle it actually requires a different technique for 'sucking." A bottle nipple and a Mom's nipple are different... and it actually requires 2 different 'methods' in order to suck from it... so, some babies get 'nipple confusion.' and thus, appearing that they will not 'switch' to a bottle.
Just make SURE, that her daily intake is ALWAYS sufficient & she is drinking enough... or she will get dehydrated. Make sure that your care provider ALWAYS feeds her ON DEMAND... yes, even from a bottle. This is very important for a baby. Do NOT have her on a feeding 'schedule' or the baby will get insufficient intake and per any growth spurts that arise.. ...and at these times, a baby will need more intake and to feed more often. And this is normal, because they are growing. But if fed on a 'schedule' a baby will not receive what they need developmentally, and sometimes, they will not thrive the best this way.
I love the "MAM" brand bottles/nipples.My son had no problem with this one.
you can get it on www.amazon.com
just use the search word "MAM bottles"
The bottles also has no "BPA's" in the plastic.
Good luck,
Susan