I used Philips
avent storage cups as they hold more than a bottle (and are freezable if you were storing the milk for longer than a day or so) and I am now using them for weaning - they screw in the same as a bottle, very handy.
Not exact matches
To convert all
Avent bottles and
cups into
storage containers simply remove teat or spout and insert disc, ensuring raised area is completely through hole in screw ring.
The
Avent sealing discs convert all
Avent bottles and
cups to milk and food
storage containers.
The
storage system that
Avent came up with is to use
cups with lids to store pumped breast milk.