What is the best way to apply deodorants, hair sprays, bug killers and window cleaners? For a decade after Windex introduced its now familiar bottle back in 1937, some manufacturers found the answer to the multimillion-dollar marketing question in the finger-operated pump, and they packaged a variety of products with reusable squirters. Then, in the postwar years, the Ffft of pump sprays was largely replaced by the ssst of aerosol pressure cans, which were simpler and more convenient. Now, however, pumps are making a comeback. Sales of products equipped with them are rising:...
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