You can mix feed - evening, night feeds and morning bf, formula/expressed in the day. Knackering, though.
My tips are:
1 stay ahead of the baby's hunger - aim to be ready to feed/or make a bottle up and leave to cool, about half an hour before a feed would be
2 buy those frozen sleevey things for wine bottles, keep in freezer
3 make milk up in bottle (fat Avent-style fit best) and to cool, shake it around in frozen wine sleevey thing OR put hot bottle in 1pint pyrex jug and have cold tap run full and fast on it, swirling the bottle around a bit,unless you're walking up and down jiggling a howling baby
4 two half-bottles will cool quicker than one big one, so cool the first one using one of the above methods, feed it to the baby, whilst leaving the second bottle in cold water/frozen wine thing (what are they called?) to cool, use when the first one is done
AND
expensive, but buy ready made up cartons, pour into bottle, microwave for 20 seconds and go!