The present invention relates generally to the field of nutrition, health and wellness. A suspension is added to a tube. The method is especially suitable for the copper extraction process. One of the snap formations is elastically deformable transversely of an opening direction into and out of latching engagement with the other of the formations. In one example, the display of a mobile device is turned off during a phone call on the mobile device when a proximity sensor detects an object is proximate the device and an accelerometer determines the device is in a first orientation.