It's really very simple... drink without evaporation drips on your table and to keep your cold drinks cold for longer periods!
Koozies are used to insulate a chilled beverage from warming by conduction and heat radiation, like a hand, warm air, warm surface, or sunlight. Using a koozie can reduce the rate a drink warms in the sun by up to 50%
Option 1 (image 1 and 2 on each sides)
Option 2 (image 3 on both sides)