Icon for bookmark, save...

Many sites have functionality for saving links or articles. You can bookmark tweets, save instagram photos, and of course save articles on DEV to read them later.

Couple days ago we've been debating internally about symbol for "SAVE" action on DEV, wondering how many people nowadays actually know what the icon above means. Do you know what it is? Is it too meta or is it actually perfectly on brand? And the most importantly: do you feel old now ?