But why are most e-ink displays hidden behind a rigid glass screen and not made bendy?
We noted that the ambitiously thin design made the device a bit bendy and creaky.
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Bendy buses have fully replaced them on only three, and newer double-deckers on the rest.
He replaced them with the "bendy bus, " snake-like Mercedes vehicles that terrified road-users in the narrow streets.
As you can see, the 73, which used to be a bendy bus route, is the most complained-about.
The advertisements will run on 200 bendy buses in London and 600 vehicles in England, Scotland and Wales.
Isle of Man passengers will get their first experience of bendy buses on Monday, when a month-long trial begins.
Among Johnson's pledges was to scrap the accordion-like bendy buses and replace them with a British-built Routemaster, which appeared on the streets this year.
By most rational lights, the bendy buses, of which 31 are already in service with another 70 coming by next year, are a welcome innovation.
ECONOMIST: Why mourn creaky old buses when you can welcome new ones
His 127-acre farm, where bendy old oaks give way to neat rows of waist-high tea bushes, is the only place in America that produces tea commercially.
But consumer products that fit the bendy, stretchy description are still very few - in part, because there have been no equally stretchy, rechargeable power sources for them.
There are other technologies that could make your smartphone bendy.
But the report also revealed bendy buses had a shorter dwell time than Routemasters if 10 or more passengers boarded, but a longer dwell time than Routemasters when fewer than 10 passengers boarded.
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"It's my favorite thing, I learned on my first trip here, " Rice told reporters, taking a sip from a bendy straw, according to CNN colleague Hala Gorani, who has a sharp eye for detail.
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It is also true that London's new single-decker bendy buses, which are widely used on the continent (they hinge in the middle and therefore go round corners easily) are foreign, and therefore to traditionalist tastes unwholesome and unwelcome.
ECONOMIST: Why mourn creaky old buses when you can welcome new ones
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