Fat burning water?? I'm skeptical

So on Facebook someone posted a link to a site that had a recipe for fat burning water.  No ingredients look suspect. So I'm game. Supposedly all I need to do is mix this up let stand overnight and drink for the next four days each time I'm thirsty.  I'll drink probably in one day so I don't know if I should mix up a batch each day. 

It's lemon, cucumber, ginger and mint leaves. 

To my surprise. It tastes hot (spicy). The ginger no doubt.