Cocoa powder tastes ordinary and slightly bitter, because it is defatted and sugar-free, and there is no added purity of 100%. In fact, all natural slimming drinks have an average taste. Degreased cocoa powder with a purity of 100% is a bit bitter and sour in the mouth (because cocoa powder is acidic).
It is impossible to ask for a natural slimming product as effective as a drink, at least there is no such product on the market at present. Cocoa powder is not instant coffee, so it will separate from water after a period of time.
And cocoa powder, not sand, but cocoa. I hope my answer can help you.