Design and furniture: Which furniture item was invented by California designer Charles Prior Hall? Context: A bedroom product that used a sealed, water-filled support system. Choose the correct item.

Difficulty: Easy

The waterbed
Modular bean bag chair
Recliner with integrated massager
Convertible sofa bed

Correct Answer: The waterbed

Explanation:

Given data

Name the 1968 furniture invention by Charles Prior Hall.

Reasoning
Hall introduced the waterbed, a vinyl mattress system filled with water to distribute body weight and reduce pressure points.

Common pitfalls

Attributing the waterbed to generic 1970s trends; the key patent and debut date trace to 1968.

Final Answer
The waterbed.

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