Zojirushi Stainless Bottle, 34-Ounce

I have used it primarily to hold cold items. As I am a diabetic, it is imperative to keep my insulin pens cold when traveling. I recently took a 60 day trip and needed to keep the pens cold (they have a 30 day life when at room temperature). My method was to put 5 or 6 ice cubes into a ziplock bag and then arrange the pens around that. On a long 15 hour flight from Chicago to the Middle East, the ice cubes were still frozen when I arrived at my destination.

This insulated bottle keeps hot beverages hot for over 6+ hours. It is also more compact and lighter than conventional thermos bottles that do not keep beverages hot for half as long.