You don't even need to go to the website to buy it, you can use the Skype username or WhatsApp number. I'd suggest not purchasing this, though... it's probably legal where you live, but it doesn't sound very safe. Edit: I just found out it's mostly used on animals. Hm, I wouldn't give this to your animals either, without a vet or something alike recommending it.
Where did you find that? I don't see it in Google image results, and you uploaded it to imgur (I assume), so I can't get any clues from the link either.