Yup. In theory making good instant coffee is a pretty simple idea but I can tell you that if I knew what I know about the process I'm not sure I'd start this business all over again.
And yet, those often make the best businesses. Businesses that do not require extensive domain knowledge are easy to copy, businesses that have no 'moat' (barrier to entry) tend to be overrun by competition initiating a very early race to the bottom in price where the only thing that matters is to hit the largest possible scale as soon as you can.
Having a moat like this gives you breathing room, so cherish it.
Hard is good in startups.
Mr. Wonderful and Mr. Coffee will knock this off in μseconds if there's any traction.