Hi
i was a fan of the bags for ages but recently discovered some little pots i think they are Avent they have screw top lids and you can wash and reuse them. I have now stopped using the bags and use the pots instead as i can reuse them and dont have so much waste. Also i always have them i dont run out like i use to with the bags. I found them in the chemist one day when i was looking for something else. I think you can put up to about 120ml in them but you could put as little or as much as you wanted to.