It is NOT a better idea. If somethings jams you would much rather have a plastic cut break than have a much more expensive part of the mechanism bend or break.
If the cup broke there's a reason. Check the mechanism and fix the underlying cause.
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2004 Boxster S Silver - FUNTOY
2002 Boxster Base Guardsy Red - FUNBOX
1987 Caterham Super 7 1700 Supersprint
2009 Mercedes Benz CLK 350 convertible
1941 Dodge Luxury Liner Coupe
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