In May I'll be going on a 5 1/2 hour plane ride to go to my daddy's wedding. She'll be basically 2 months when I go and I was wondering I know I'm only allowed to bring about 2 full bottles on the plane but what if they get cold? How can I keep them warm or maybe warm them up whilst on the plane? I usually just put them in the microwave and shake them up really well before feeding her but this isn't an option on a plane. Anybody know of anything I can do?