The Waterproof Teabag – a New Brainstorm Method

[ad_1] Consider for a moment these self-contradictory innovations: The solar-powered torch (flashlight) The inflatable dartboard The underwater hairdryer The waterproof teabag The concrete liferaft At first sight they look silly but each contains the germ of an interesting idea. You can charge up a solar-powered torch in daylight and then take it into a cave. …

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