Are you looking at one for all of your supplies or just the insulin?
If you need one for just the insulin and don't need to keep more than 2 bottles cool I highly recommend this.... Amazon.com: Medicool Insulin Protector Diabetic Insulin Carry Case Color Blue: Health & Personal Care
Here is the Medicool website that has a little more info and additional items... Medicool - Cases and Bags to keep insulin bottles or pens cool when you travel
I'm not sure if any of those will work for your needs, but I'll say they all work great for me and take a good beating.
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●Blue Ash, Ohio Police Dispatcher
●Type 1 diabetic for 25 years (11 months old)
●Animas pumper since December of 2002
~IR 1000 (Dec. 2002 - Jan. 2005)
~IR 1200 (Jan. 2005 - Jan. 2009)
~Cozmo 1800 (Jan. 2009 - ?)
●Dexcom Seven+ since August 1, 2009 Diabetes is an Art, NOT a Science. You must master the control by skills and not by knowledge alone. | 
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