Expressing milk into a "freezer bag" query on hand breast pump(avent)

[colette]

Ds is now 6wks old and I would really like to get into the habit of having expressed milk ready in the freezer,basically so that I can have a bit of free time now and again.
I have dug my avent hand pump out(not used for 5 yrs and only a few times )I'm looking at these freezer bags and am confused as to how to use. Are they supposed to be sterilised? And if so how?
Do I put the bag inside the not fully enclosed bottle when expressing?
I have lost the instructions and have not got the hang of hand expressing. Any advice welcome.

I never sterilised the bags but I would advice you to buy new bags and throw any old ones away. I found the best way to express was into a sterilised bottle then pour the contents of the bottle into the bag. Also I only bagged up 2oz at a time as this saved a big bag being wasted then if baby wants more it only takes a few seconds to defrost another bag. Hope this helps, you could always nip into a shop and take a sneaky look at the instructions or my avent bottle had a contact number on the side of the box to call their helpline. Good Luck