Take an empty two-liter soda bottle, wash it out, fill it with water, screw the lid on tightly and set it into your toilet tank, as far away from the flapper valve as possible.

拿一个两升的空汽水瓶，洗干净，装满水，旋紧盖子，放进马桶的水箱里，离舌形阀越远越好。

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Soon after, with the advent of war and then the streamlined flapper look, feather prices crashed.

FORBES: Magazine Article

Berlin's creative boom rivals even the smoky jazz club and flirty-flapper cabaret heyday of the early 1920s Weimar Republic.

WSJ: Berlin, An Insider's Guide

In the coat department, a 20-something couple (he in black mohair, she in denim shorts and red tights) argue loudly about the merits of a fake-fur jacket, while a couple of German tourists trundle by with flapper-style dresses slung over the top of their suitcases.

WSJ: Tina Gaudoin on Style: How to Wear Topshop Past 25