I have this and the KT Recovery+ system. I have to say that this one is very easy to use. The metal ball holder is easy to open. I often have to fight to open the CT sphere. The KT Ball also likes to cross threads very easily. It takes a lot of work to open it. So for the money it's fine. Stay cold for a while. Hot not tried yet. I expect it will work fine in the heat, just be careful not to overheat the metal ball in the hot water or you might burn yourself a bit.
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