Ossur Cold Rush

https://www.youtube.com/watch?v=1vwDFtbzpSM
Price includes universal sleeve. 
Cold Rush's holistic design features a durable motor, a stronger flow rate then the top selling units and an industry-leading ice-to-water ratio that ensures longer cooling times. Yet, it is whisper-quiet and compact, weighing just 4.6 lbs (2.1 kg).
 
Key features
Go with the flow. By incorporating the same durable motor used in much larger mobile air conditioners and refrigerators, Cold Rush provides consistent cooling and excellent compression, even to high elevations.
Quiet as a whisper. Cold Rush uses a brushless motor to produce a whisper-quiet (30 decibel) unit that allows patients to get the rest they need to properly rehabilitate from their injuries.
Stay cooler, longer! The highest ice-to-water ratio in the industry and a design that produces less heat transfer from the motor to the water combine to ensure cold therapy pain relief for up to 6 continuous hours.
No igloos! Far more than just a modified beverage cooler, Cold Rush was designed holistically, with unique features like a locking lid to help prevent spills and insulated walls for improved cooling.