Bob spilled his 1st cup of green tea yesterday. As he cleaned it up, he drank the rest of the brewed tea and planned for a fresh brew later in the day. He restricts his intake for good sleep.
I made his afternoon tea and enjoyed a bit more of it than usual.  I noticed it gave me a little lift during our walk and sharpened my critical thinking. Those effects may be positive for certain purposes, but not for all. 
How much caffeine do you consume? Could restricting it bring you more rest and peace? Ki to Happiness drinks jasmine green tea for its healthful benefits and restricts it to avoid its drawbacks.