Youâd think I would know the answer to this, but Iâm not sure. I use it to ice down my knee ( my wife uses it on her hips and back ). You fill the bucket with ice, then with water to the line. Place the lid with the pump on top. Plug it in and the ice water is circulated through the special pad. Itâs better than a bag of ice. I figure the steward can bring me ice nightly, or if I need it during the day.
thanks for the help.