I don't know much about these things but I think collectors call them Mickey Mouse insulators. No wait ..... nevermind ...... rub that out.---- This CD 257 Patent-Other in a sharp, crisp ice aqua will put your common light aqua unit to shame. Great clarity to the glass will let you see the very light yellow tint in the ears. Strategic bubbles, perfect drips and easily readable embossing front and rear will make you smile. We're talkin' J-lo here if ya know whatta mean ! Pinky nail chip on the rear ring for only damage. -- Again, this isn't a light aqua unit. $50.00 + shipping. First email that says' "I'll take it.'. No PayPal. Email with questions.