For those who like to shop while taking their dog for a walk, a London girl had an idea in 1960. She fixed a rubber suction cup to the end of the dog’s lead that can be attached quickly to any plate glass window. To leave the dog safely tied outside a shop, she merely pushes the suction cup on the shop window. The cup has been found to hold firmly in spite of persistent tugging over periods of an hour or more. Yet it can be removed easily by lifting the edge with a fingernail.
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