I spotted this over at the awesome site, Cool Material. As an owner of the corkcicle, I was pleased to see they've adapted the genius idea for beer drinkers - or anything that comes in a smaller bottle and is served cold.
The Chillsner is the first ever in-bottle beer cooler you can drink through. Simply toss it in the freezer for 45 minutes, take a sip out of the beer you’re going to put it in, then pop in the Chillsner and you’re good to go. Staying cool for a long time, the Chillsner will even keep that gross last back-washed bit nice and cold.
Each purchase includes two Chillsners, a freezer storage case, and two instructional coasters. No more warm beer and no more funky koozies.
$30 USD. Buy it here at Cool Material