Right now I am using a green coffee bean based pre-workout powder from Ora Organics which I am obsessed with. It tastes really good. So far I have tried the Ora Organic Pre-Workout Supplement -Pomegranate & Berry Flavor. It has 80mg of caffeine but doesn't leave me jittery or wired. Its a blend of green coffee bean, yerba mate, matcha tea, eleuthero root and ginseng. It mixes up really well and is super tasty. Highly recommend. Here is where I found it online: