BUILT TO LAST: thanks to safe silicone, flexible and at the same time , the cap can last for an indefinite number of coffees, if used correctly SILICONE CAP: Thanks to its flexibility, silicone allows you to reproduce the same extraction of disposable pods, with results in terms of taste and creaminess, without damaging your Vertuo machine in any way. It is also and free SIMPLE TO USE: just remove the thin aluminum lid on the disposable capsule, fill the capsule with ground coffee and then close the capsule with the cap. Simpler steps, less money, more environmentally friendly