What is Planet Green Sleeves? Planet Green Sleeves are reusable, customizable sleeves that are safer for hot and cold liquids. Its ergonomic shape fits perfectly into the hand of the end user. The sleeve keeps the temperature comfortable for holding, thereby preventing potentially harmful incidents and providing a long-needed improvement of corrugated cardboard sleeves in use today. Our mission is to promote environmental consciousness through the use and sale of reusable beverage sleeves fashioned in an ergonomically designed sense and recyclable at the end of its life.