^That sounds like a fantastic job!
As for an answer. I have a shirt that I got on April 8, 2006. I remember the date cause I got it for my birthday haha. I know 2 1/2 years really isn't THAT long (especially compared to my mom. she has this striped shirt that she's had for over 20 years that she still wears all the time), but when you're 15...yeah.
I still wear it - infact I wore it today and as I was putting it on I was saying "I can't believe I still own this thing." lol.
What do you think is your greatest personal achievement to date (if you're comfortable sharing)?