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These are miracle fruit tablets. They`re made from a certain type of berry that`s found in Africa, and when you rub them on your tongue, molecules will bind to your taste receptors, and sour foods begin to taste sweet. A lemon will taste just like lemonade. The effect lasts about 30 minutes. They are 14.95 and can be seen on http://www.neverendingstuff.com.
Source link: http://neverendingstuff.com/miracle-fruit-tablets/