Can also be used on the refrigerator. Cup holder that can be attached to the water jug; Cup holder that can be attached to the water jug. The strong magnet will not fall off even if you pull out the paper cup. Can also be used in the refrigerator. Convenient and useful for a variety of occasions. For cups 7.9 - 7.8 fl oz (205 - 210 ml). (You can set 16 to 30 paper cups. Comes with a lid to prevent debris from entering. For metal water jugs such as colored steel plates. Cannot be installed on resin portion: 18-8 stainless steel and aluminum. Size (approximate): Width 3.3 x Depth 3.5 x Height 4.5 inches (85 x 90 x 115 mm); Storage cup size (approx.): Outer diameter 2.8 - 2.9 inches (72 - 74 mm); Height around 3.1 inches (80 mm); Capacity 7.1 - 7.5 oz (205 g); Made in China.

From the Manufacturer

Water Jug Cup Holder

Cup holder mounts to water jugThe magnet will not fall off even if you pull out the paper cup.Can also be used in the refrigerator.Convenient and useful for a variety of occasions.For cups 205-210ml(You can set 16 to 30 paper cups.Comes with a lid to prevent debris from entering.For metal water jugs such as colored steel platesCannot be installed on resin portion: 18-8 stainless steel and aluminum.