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It's normal water, not chilled. We get it chilled only in the Winter, when the temperature goes down.

Hmm, tough one, do you have a river or lake near you that is cold? Is it easy to get access to ice?

If not, you may have to wait until winter to start this exercise! :-)

Cg

No chance of ICE at any time, but yes, during winter we will get chilled water and give it a try.