Solar and Dynamo LED Lightcups Power Up Your Beverages
These Lightcup drinking vessels feature a solar or dynamo-powered LED lamp fixed underneath the lid that can be used as a flashlight or a warning signal (white or red light settings) when camping, hiking, etc. It’s an interesting idea, but it would be even more helpful if it included a UV light setting to sanitize [...]
The Shake-u-lator Calculator
If you are the eco-friendly type, cheap, or you have built up an enormous amount of wrist strength after years of touching yourself, the Shake-u-lator Calculator is perfect for all of your math-related needs.
The Shake-u-lator uses Faraday’s Principle of Electromagnetic Energy to operate - no batteries or solar panels required. Just give the calculator a [...]
