Tired of using different Koozies for all your differnt drinks?  Try the Universal Buddy by Frost Buddy!
Fits the following: 
12 oz cans
12 oz slim cans
12 oz bottles
16 oz cans
16 oz bottles
Works as a tumbler (accessories sold seperatly)
 
1 Internal attachment
Fits in cup holders
non-slip rubber bottom
vacuum sealed stainless steel