I am about to have baby number 2. I used the Avent Isis pump and stored milk in the Avent bottles for number 1 and found it to be a great system. The only hitch was the tape I would put on the bottles to date the milk would always fall off. If I tried to put the new ones in the back and just rotate that way I was always nervous the bottles had shifted. I saw a rack which would rotate the bottles but you could only use the bottles that came with the rack. Has anybody seen a rack that would hold the Avent bottles or have another idea?