I do not think any other insulator rates with this one when it comes to bubbles. Trad-zillions of them...and then some!! An endless galaxy of a milky way of tiny bubbles all-through the glass! Wow!! This Zicme is lavender with a tad of a grayish hue. The finest of Zicme's in my opinion (and Joe M's!). From the renowned Caleb Thimell collection (thanks again, Caleb!!).