Imagine a delicious glass of summer iced tea.Take a long cool sip. Listen to the ice crackle and clink.Is the glass part full or part empty?Take another sip.And now?

My thermos does such a good job of keeping my tea hot that it feels like I’m drinking iced tea.

Iced tea! Nothing is half so refreshing as a glass of black tea piled high with ice! More than a quencher of thirst, it is a tamer of tempers, a lifter of lethargy, and a...