telltale

Reader's　Digest 10月号の記事 "We Found A Fix" からの引用です。
If you put on a fresh shirt only to discover a telltale streak of white deodorant residue, don't despair. Just rub another article of clothing (a shirt or a sock, for instance) against it to transfer the stain. If you're already out when you notice a smudge, the sleeve or an inside area of your shirt will do.

"telltale" から私は直ぐ '暴露する（人）'、特に人、告げ口をする人や密告人を連想してしますのですが、人の他にも "telltale" する物があることは以前（9/9/2015）既に学んだはずですが...

・Cambridge English Dictionary: allowing a secret to become known: She found lipstick on his shirts - the telltale sign that he was having an affair.

canteen

Ernest Hemingwayの短編小説 'The Short Happy Life' からの引用です。
"Could I have a drink of water?" Macomber asked. Wilson spoke to the older gun-bearer, who wore a canteen on his belt, and the man unbuckled it, unscrewed the top and handed it to Macomber, who took it noticing how heavy it seemed and how hairy and shoddy the felt covering was in his hand.

"canteen" とくると食堂しか思い浮かばないのですが、上記の "canteen" は文脈からして、どう見ても水筒ですね。水筒の意味で使われている "canteen" は既に（9/10/2013）取り上げていました。