3D Model: Transform This Thermos Flask Into A Small Portable Insulin Refrigerator. Keep The Thermos Shape As The Main Insulated Body. Add A Peltier Cooling Module On The Side, With A Heat Sink And Small Fan Inside For Cold Air Circulation, And Another Fan Outside To Release Hot Air. Keep The Lid As The Main Opening For Inserting Insulin Pens Or Vials. Add A Small Digital Temperature Display And A Simple Power Input Port. The Design Should Look Practical, Medical, And Minimal.