Have to go beyond being a great insulator. How about awesome? Or classic? I think classic. This is a blue-aqua CD 127 with a big 2 on the dome. On the crown in embossed L.A.C. PAT. JULY 25th 1865 and on the skirt in large bold embossing, W. U. PATTERN. There are two or three little pings scattered about, but you'll marvel at the fantastic condition of this early, early threaded beauty. This is one that I feel is a bit under valued in the price guide. I'm asking $650 and as usual, I'll pay the shipping.