[misterhtmlcss]

That's some interesting calculus there. You don't want to wash 2 cups for a total time investment of 60 seconds, so you choose to generate extraordinary waste to save 30 seconds, damage the environment and your health. Makes complete sense to me.

[mdoms]

Not to mention if you're using the cup for only water and you're the only user then you can easily get away with washing it once a week or less. Washing a water glass after every usage is extraordinarily wasteful.

[Skunkleton]

My solution saves all 60 seconds. I just use my coffee cup for water and never wash it. I wish I was joking.

[kazinator]

You can use your coffee cup for coffee and hardly wash it.