Here’s a heavily portable 20 liter capacity Mini Fridge that displays the current temperature inside so you can be sure that your bottles are cold.
Deluxe Mini Fridge Warmer with Digital Thermostat features a self locking door handle and control buttons that chills up to 44 degrees Fahrenheit and warms up to 140 degrees. The Deluxe Mini Fridge Warmer with Digital Thermostat also comes with slide out shelf that is adjustable up to 3 levels, a large see-thru window and a large digital LCD readout so you can easily monitor the temperature status as it reaches your pre-selected settings.
– $99.99 at thinkgeek