Hi, congrats on your bub. I express for when I am at work. I steam sterilise all my pump equipment and bottles, I know it's a little over the top but it makes me sleep easier at night knowing everything that I am feeding my baby girl with is if not sterile at point of use is at least extremely clean. I don't worry about condensation, I let the stuff air dry for a bit and then I store it in a container. I personally don't like using miltons on anything that she is going to chew or suck on as it is quite a harsh chemical. I do soak her plastic toys in miltons every week or so though. The ABA has some fantastic articles on expressing and storing breastmilk. I make sure I put my EBM straight in the fridge after expressing and I freeze it before it reaches 24 hours in the fridge if it's not used. Avent have these nifty little storage cups which can be frozen and thawed and sterilised and thrown in the dishwasher which I find are great, you can also get special bags for freezing breastmilk in. Good luck and I hope you enjoy the added freedom expressing can give you. Hope you found something useful.