Material: Made of quality plastic, durable and sturdy, not easy to break or deform. Good sealing：The cap is made of soft rubber material, with good sealing effect, to prevent the water from spilling out during using or transporting Size：In blue color, with length of approx. 2.8 inches/ 7 cm, and opening width of approx. 0.67 inch/ 1.7 cm Simple to use：Fill with water, close cap and insert the flower stem. Very simple step to keep your flowers fresh. Transparent design: the plastic water tubes are designed in pretty clear blue color, easy for you to see the flower stem status and remaining water inside