The eco-friendly “green“ tea lights are made from ethnically sourced Swedish NON-GMO and additive free 100% rapeseed oil, resulting in a very clean burn and no soot or fume releases. Good for your health and the environment. They contain NO paraffin unlike traditional tea lights. The cups are 100% PLA, a compostable bioplastic derived from plant sugars. You will get approximately 4 hours burning time from one.