I put the instant crystals in the cup, add water, put it in the microwave. In one minute I have coffee. When you have to be at work at 3 am, you sleep as late as you can, and don't leave enough time to drink more than one cup of coffee, let alone brew fresh coffee.
Actually, I used to buy concentrated coffee syrup, don't know why I stopped. It was better than crystals, but needed to be refrigerated.