Finally, he stuck the bottle in the back flap of his fishing vest to take home and reuse.

NPR: Excerpt: 'World Made By Hand'

Just as he starts removing the diagrams from the envelope in the back flap, he changes his mind and stuffs them back into the envelope.

BBC: The sex manual for ultra-Orthodox Jews

The brand is best known for its fit, along with its Union Jack logo and signature triangle flap back pocket.

FORBES: Rob Gronkowski Partners with Hudson Jeans #InstaCampaign

You can tell a guy has raced before when you see him whip out a tube of super glue to stick a flap of skin back onto his foot.

FORBES: Hypothermia for Fun and Profit

Sniffing is regulated by the soft palate, a flap of tissue in the back of the throat that directs the flow of air through the mouth and nose.

ECONOMIST: Monitor