I had the same idea about saving on coffee around 2003. I started making coffee at home. But I found that a drip coffee maker needs to make a minimum of about 4 cups of coffee to make proper coffee. I was only drinking 2 cups, and I was throwing away 2 cups. This seemed like a giant waste too. I used this to justify a fully automatic espresso machine that makes a variety of coffee drinks one cup at a time without extra waste. The payoff (in savings) of the fancy machine was quite long but totally worth it in the long run. The first machine was done after about 12 years and I'm on a second one now.