Quote Originally Posted by Cerberrus View Post
okay perfect i will use the thermal bag but leave it open a bit for air flow and get a little bit hotter then lukewarm bottle wrap it in platic wrap. like i mentioned it is 5-6min walk so i will be there in no time i was more worried about the sudden shock of cold
Don't wrap a warm bottle in plastic wrap- use a terrycloth towel preferably, or even newspaper/or a paper bag to insulate. Plastic wrap doesn't work well for that- it won't "soften" the heat.

And actually, you said it was a 7 minute bike ride, which is a much greater distance than a 5-6 minute walk, but whatever.