I'd advise you, Nietz to avoid doing that here It is very unlikely that you are actually served a proper drink, let alone the one you requested. Do take care and examine the drink closely before even attempting to come close to it.
Invisibility? Interesting... *equips thermographic goggles and takes out a scalpel and a syringe* Hey Nietz! Can I take some blood and skin samples of you? Won't hurt, promise!