Refreshing
Cool, Fresh
noun, な adjective
A pure cool is refreshing and cool, isn't it.
せいりょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
十分間にどれだけの炭酸入り清涼飲料水を飲めると思いますか？
How many carbonated soft drinks do you think you can drink in ten minutes?