Trinity Candle Factory Premium Scented Blueberry Fields - Fragrance Oil - 1/2 oz. - Concentate. This fragrance oil can be used for many things including wax tart refresher oil, fragrance warmers, oil warmers or diffusers, light bulb rings, refresh your candles if needed. etc.. This scented fragrance oil is a very strong concentrate it does not take much. Best used with fragrance oil glass dropper. This blueberry candle smells like a oven bake huge plump, steaming hot blueberries. Wow! 100% Satisfaction Guarantee.