Royal-T is an organic Rooibos Tea from South Africa, and they want the members of GCJ to know that rooibos tea is a natural and more effective sports drink than commercial sports drinks (and better recovery and protection for livers). They've offered a special Amazon promo code for Golf Club Japan to get free shipping on Royal T from Amazon Japan on the following link:
It's valid until December 31st.
It has to be through the link above or the promo code might not work.
Their article to back up their view about Rooibos as a sports drink is on their brand website here in Japanese.
But they've also provided an English version of 'Rooibos tea as a sports performance driver.