Our Firefly Bliss Petite is a hand-blown, round liquid oil candle is for indoor or outdoor use. It is a simplistically elegant and well made. We use several on our dining table at night. They maintain their beauty night after night and never change unlike messy wax candles. You can use them alone or in a lantern or candle holder. Refilling is a snap with the included funnel. This Bliss glass candle is clear. The light green color is simply a reflection of the glass from under the oil candle.The candle should be placed in a safe location. The wick holder sits securly in the neck of the candle. It does not screw in. This is unnecessary, as the manufacturer. The bottom is flat and stable. Tipping the candle over, and we've done this, results in the flame extinquishing and some loss of fuel which is not dangerousl just a bit messy and easy to clean up. We suggest using unscented Firefly CLEAN Lamp Oil, Firefly Paraffin Lamp Oil or Safe & Green for the best performance. NEVER use any type of vegetable oil. Always use in a ventilated area and make sure the flame is not close to any solid material. You can easily create colored lamp oil by using our lamp oil dye. Hand-Blown Borosilicate Glass Oil Candle Diameter at Largest Point: About 3 inches; Height: 3 inches to the tip of the wick Burn Time: Approx. 16 Hours, will vary by fuel type Fuel Capacity: 2-3/4 ounces Each piece is unique; therefore, dimensions may vary.