Beverage container insulator

A beverage container insulator comprising:

• a body defining a cylinder extending about an axis and having an opening at a first end to receive a beverage container and a second end that is opposite to said first end relative to a height of said body wherein said height is defined along said axis and wherein said axis extends through a center of said opening;
• a web fixed with said body, at least partially closing said second end, and configured to prevent the beverage container from passing fully through said body;
• first and second surfaces defined on opposite sides of said body and extending along said axis between said first and second ends, at least one of said first and second surfaces configured to receive and contact the beverage container when the beverage container is received in said body;
• a plurality of apertures positioned at said second end and spaced from said first end, each of said plurality of apertures defined in said web or between said web and said second end of said body;
• and
• a closure assembly positioned on said body at said first end and spaced from said second end, said closure assembly positioned closer to said first end along said axis than said plurality of apertures, said closure assembly having first and second closure members affixed to opposite portions of said second surface of said body at said opening, said first and second closure members selectively engageable with one another to selectively and substantially close said center of said opening.