The replies to that tweet are a good laugh. The "Kure Oxygen Official" twitter account was made in July 2019, it has 67 followers and three tweets.
Millions of FAQs: FAQ - Kure | Supercharged with 10x Oxygen (kureoxygen.com)
Shop - Kure | Supercharged with 10x Oxygen (kureoxygen.com) £1 for 500ml, equivalent. Almost reasonable value.