I found this a while ago, and found these are uncommon. I am lost from there. When I looked in the Price Guide, the value is $50-$75. I don't know if this is true, so any information is helpful. I thank you in advance for any input.

The only two colors that match this insulator's exact embossing in the price guide is light blue with milk swirls, which the book value is $50-$75, or milky aqua, $200-$250. Are either of these correct?

I no longer own this insulator...