Identify two-pin through-hole component

Now let's take a look at how the component actually looks.

Step 3
The component is:
 * A small cylinder with stripes, one wire each end
 * A small flat disk with both leads at the bottom
 * A metal can, usually coated in plastic, both leads at the bottom
 * A metal can, usually coated in plastic, one lead at each end
 * A cylinder wrapped in heatshrink, both leads at the bottom
 * A small solid blob with one lead at each end
 * A small solid blob with both leads at the bottom