Review on Final Touch Yarai Jigger by Ken Hamdan

I've read most of the reviews and most have been really positive but personally I haven't had much success with this jigger. It looks amazing right away, but the numbers faded pretty quickly, and even after washing my hands in cold water, I could literally wipe the numbers off with my finger. So now I have a cool glass jigger without dimensions. still looks cool, just doesn't work for accuracy.