DS is off to nursery soon 2 days a week when I return to work.
He's on solids now, lots of varied food, but still breast feeding a couple of times a day and at night. I've tried (not very hard admittedly) to wean him off day time feeds in anticipation of returning to work, but he loves it, I like it, it works for us atm.
I can't express (had a freezer full of milk with DC1 and a bottle refuser, but can't get a drop out this time for love nor money)
Do I introduce formula at this stage and a bottle? Or cows milk and a bottle (aware he won't quite be a year).
Or straight to sippy cup (but then he won't get the comfort sucking gives him)
Any advice please? 
And if I do go with bottles and formula, do I need to steralise?