I used to use one of the famous coffee pod coffeemakers. I would need to use at least two of them in the morning and another one or two at lunch. Not only was this expensive, it was incredibly wasteful. Now, I’ll add two teaspoons of liquid caffeine to a water and be good to go! I get a good, steady, non-jittery boost without the resulting crash of an energy drink. It’s like with the multi-symptom medicine you can buy. Why take a bunch of medicine for a fever and a cough when all you have is a runny nose? I love being able to add JUST caffeine to a drink and to add the amount that I want. I bought the two bottle deal (regular) and take one bottle to work with me for an afternoon pick me up. I love this stuff!