10/20pcs Plastic Pet Bird Drinker Feeder Water Bottle Cup For Chicken Pigeon Description: Material: Plastic Color: Blue Style: Casual Size:as the picture Features and Benefits: Easy to refill, easy to clean. Simply connect your old soda or water bottle to the fountain and you are giving your bird/pet a waterer and keeping your soda bottles out of a landfill! This drinker lets you use a bottle hanging on the outside of your bird and small animal cages. The drinker is of smooth plastic, threads securely on the neck of 20 ounce, 1 liter, and 2 liter plastic soda bottles, and water bottles that have the same threads as a soda bottle. Does not thread onto flimsy Wal-Mart style 16.9 ounce bottles with the small fine threads. Fits thru a 1.5 inch squared or larger cage opening. If you cage has squared openings smaller than 1.5'' no big deal, just snip out the wire to give you a 1.5'' opening. For instance if you have a 1/2'' spaced wire cage you snip out 3 by 3 squares giving you a 1.5 x 1.5 inch opening. Package includes 1:10X Water Bottle Bird Drinker Cup Package includes 2:20X Water Bottle Bird Drinker Cup Note: Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!