The Twisted Jewel Hummingbird Feeders are made of beautiful hand-blown glass and feature Easy Fill and Clean feeders that have 4 wide openings for easier filling and cleaning-Removable flowers base and stainless steel tubes and stopper are easily removed for thorough cleaning and ALL parts are dishwasher safe! Natures Way Twisted Jewel Bottom Fill Teal. 100 percent silicone gaskets provide Leak Free seals at the screw-on base tube stopper and flowers. Dimensions: 7.5 x 7.5 x 12. Material: Glass.