This cap is the one cap to cover them all. The Cap is made of medical grade stainless steel, which makes it durable. This component comes with all Dynavap Vapcap units. However, if you have lost it, or if you just want to keep a spare cap, you can always buy one as a replacement part. Dynavap’s signature cap is designed to “click” once it is heated to the right temperature. It also has the multitasking digger-outter. If you notice the cap clicking twice, don’t worry. That’s normal. If you find that your new cap is loose, simply squeeze it a little to adjust the fit.