There are 2 different Cyo Cuffs, one with a compression element, the other you use gravity. Inside the bucket, there is a line that says fill H2O to here, the rest is ice cubes. The electric compression model circulates the cold water and adds compression. The gravity model, you have to raise and lower the bucket above the height of your knee. I have seen very good results with the few people that bought the compression Cryo Cuff. The people who bought the gravity one were not as compliant and felt a wrap around reusable ice packs did just as good.
What ever ice system you use, add some compression. This can be done with an ACE wrap. So the term, ICE. Ice Compression, and Elevation. What makes me laugh, is when an OS tells a patient to use a bag of frozen pees. You just had a $50 thousand dollar surgery and you are going to put frozen pees on top of your knee. 50% of the whole procedure is Rehab. The OS is done in 1hr. Rehab takes months.
Best of luck,
David