Iced coffee and cold Tea in charged water were my go to when I landscaped.
I would make a large pot of coffee the night before and put in the the refrigerator over night, then put it in a thermos.
Making strong tea with fizzy water was a much bigger challenge as you had to use powdered tea and it and
charged water do not like each other, but I would buy, rare back then, bottled charged well water and carefully, very, mix them.
To me Keurig is a good way to end up with a lot of permanent trash for lazy people; where as coffee maker leave not permanent trash. I used to go through more expensive coffee makers every two to three years, even with cleaning and using distilled water often.
I have Mr. Coffee now that you can still set the timer for the morning, but it replaced a similar one that lasted near ten
near ten years. The only real difference is the way the coffee pot open the filter drain, which is actually some what annoying
as except for the plastic lid, they are identical.

I do have one that makes two single cups of coffee, the coffee pot is the glass you drink it out of, but I found it better to use the old fashioned types with a normal pot. I have the tired ones at the old home house where I have my other garden, which is turning into a junk yard for items the other half is tired of.

Addendum:
When we bought the new Mr. Coffee, it was not working well at all, the other half said get a different one, so, I took it apart and took a kink, from the factory, out of the water feed. Now it works like a charm.
