i brought "fridge to go" in Sei Yu in Shatin, it was a model which can be used to contain 4 can of 355 ml drink. I found it is very useful since last time i place a freshly squeeze milk (37C) bottle in it for 3-4 hours and the temperature was lowered to 4C!!
prettywife,
if you are using avent pump and bottles, you can consider buying "luncheon" or "pack-n-go" model.
"Luncheon" model can hold 4 avent 9oz bottles or 2 9oz bottles plus the pump.
"ack-n-go" model can hold 6 avent 9oz bottles or 4 9oz bottles plus the pump.
I also bought the one which can hold 4 cans of 355ml drinks. It is long thin in shape. I use one long (ordinary) bottle and one 9 oz Avent bottle to take the milk home everyday. The pumps are kept separately.