LSD can be stored in liquid form inside of eyedrop sized containers. MDMA and coke are powders which can be stored in a makeup bag without arousing suspicion. Weed can be baked into edibles (brownies, cupcakes, etc) or added to candy (gummies, lollipops). Basically the only thing you need to do is make sure they visually don't look like drugs, since the TSA isn't going to be drug testing everything, they'll just be passing it through an x-ray machine and visually inspecting it.