Memory foam
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People can be pretty picky about their pillows. Not only do folks prefer a different softness-to-support ratio, but that preference can change night to night. Now, a French startup has developed the Wopilo, an indecisive-sleeper’s dream pillow that’s soft on one side and firm on the other.
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Korean designers have proposed a rechargeable 1.5V battery in a memory foam case that could squeeze down from D to AAA-sized.