Ok this is cool but why? First does this mean you are also carrying a bag of unground beans? So you can have more coffee rather then just carry a cup the same size as this with out the junk. Second where will you get the hot water? If you go into almost any break room there is already a coffee machine and you have to go out of your way to get hot water which means you will most likely pass a coffee machine. So unless you plan on taking this camping, which there is plenty of better options for camp coffee then this, this thing seems pointless in any urban environment. Imho