I pre expressed for my little man knowing he would have to go to SCN for at least a day or so after he was born (ended up being four days and two of those on a drip). I started at 34ish weeks expressing into a syringe and then into the fridge.....you need to use a fresh syinge each time as you can't combine cold colostrum or EBM with warm stuff...but when I had two days worth at frdige temperature I would transfer it all into a specimen jar and name and date the jar then freeze it....you can keep it up to two days in the fridge before freezing so it makes sense to freeze it in batches especially when you will only get a few mls each express..... the specimen jars were the best option for me and I was able to grab a huge handful of them from the midwife as well as a heap of 5ml syringes.