Adam this is absurd, I doubt some shitty old bit of plastic would even last 20 years
A sink tidy would last a long time. If it got old they would replace it with an exact same sink tidy. They are still available to buy 32 years later.
The housekeeper had worked there for 20 years. She had never seen the sink tidy in a different location. Until seeing the crime scene photos.
No one has supported Lookout's & David's suggestions. No one has said Sheila did some washing up & moved the sink tidy after killing 4 people.
Bamber had to exit out of the kitchen window. That is the window that could be banged shut from outside.
The sink tidy was infront of this window. Covering a large area which Bamber had to climb onto.
Bamber moved the sink tidy as he got onto the sink & exited the window.