I'm expecting my second in November and am now a teacher without the luxury of short term disability and paid time off I had with DD(timing was off with conception and summer break!!!) I will not be able to BF after I return to work (12 wks)and pumping is not an option due to my teaching schedule. With DD my BM was not enough and we had to supplement with formula. We used Avent for FF and EBM. I had researched and they were "the best". I found them to be easy to clean and mix formula but we have a dishwasher, so cleaning isn't really an issue. But, they did leak and I had to readjust the cover etc. I'm thinking maybe there's a good bottle out there without this problem. Any suggestions? (We still have bottles, rings and covers that have been sterilized etc so the cost of buying just nipples is minimal compared to an entirely new system...but leaking bottles are no fun either.)