Our DS is a week old and we've had to switch to bottles because breastfeeding wasn't working out for us. We bought a Tommee Tippee bottle and steriliser kit but DS seems to really struggle with the shape of the bottles ( they're the ones that are meant to be more breast-shaped.) However, in order to avoid getting air trapped in the teat, we have to feed him in a horizontal position and he gets hiccups.
We are looking to buy some more conventional shaped bottles - but my question is this: is it ok to use the Tommee Tippee steriliser to sterilise bottles from another manufacturer?