TOPWEL 30ml(1oz) Refillable Clear PET Plastic Essential Oil Bottle with Orifice Reducer and Mushroom Cap (10, Black cap) Capacity:30ML(1oz) Main Material: PET Plastic Size: 84 mm x 27 mm (3.3 x 1.06 in.) These terrific little jars that are perfect for essential oil samples or for blending small amounts of oils