This adapter is made from easy-to-clean, hygienic stainless steel and attaches simply onto the tap, secured in place by a wing nut. Users simply need to push the adapter with the back of the cup or vessel. The specially-designed curved adapter reduces the risk of contact between the cup lip and the tap. Compatible with all Marco Tap boilers and Marco Jet Urns. Does not need an Engineer or install, or any machine down-time.