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Lighter users might not spend quite so much

Acknowledgements The authors thank Johannes Traut, Isabell Keimer, and Sarah Schuhmann for coordination during the sample collection and Falko Wuensche and Stephanie Hammer for their incredible technical assistance and commitment to sample preparation and measurements

Candles, which can burn continuously without the need for matches, are ideal for use at outdoor events and camping trips

Even if you clear the TSA, you may encounter other regulations at your final destination or on your return trip

ENZYMATIC The coffee bean that is roasted is actually the seed of a fruit, similar to a cherry

They're refillable, making them more environmentally friendly than disposable lighters