I went to Shanghai for 3 days when my girl was 3months....
I pumped and asked the hotel to freeze the milk for me ,...
On the day i left, i went to Hangen-daz ( ice-cream store), bought some ice cream to-go, gave the ice cream to my friends, becuase the gave dry-ice..i use the dry ice to transport my frozen milk back to HK....
it worked!!!!