distilled water /pure water /distillate

The answer is distillate.

(1) What is 「distillate」?
The liquid collected in the process of distillation is called distillate of the distillation.

(2) What is 「distilled water」?
If a sample of water contaminated with mainly non-volatile impurities (e.g. sea water) is undergone distillation, the distillate collected is also called distilled water. Distilled water usually contains more than 99% of water.

(3) What is 「pure water」?
A sample of water without any impurity is called pure water.

distilled water ...

因為佢係collected