I have a 10-month old, and have been back at work (very) full time for the last two months. I tried expressing at work, but we had a bottle/doidy cup rejection. But, we were doing great on a bit of juice and milk with cereal, and bf first and last thing to get us thro the day. Only now, the last thing bf - its all crying and screaming and tantrums - why??? The first thing bf is still going ok.