Only used 2 or 3 times. 3 tiny marks on the back. The easiest, cleanest and most versatile way to steep loose leaf tea on the go. Forget wet tea bags and infusers with this Teal Tea Press. Just add your tea to the double-walled stainless steel mug, let it steep, then stop the infusion by sliding the press down. Want a cold one? Just add ice. Now with a push-button lid closure to prevent splashes and make it even easier to sip.