This piece is designed to provide a vacuum fit hold on your can. On this piece you will find a stamped maple leaf on the bottom in the middle is a point that it is perfectly balanced to spin on a hard flat surface to fidget or to mix drinks. It also is chillable so you can store it in the fridge freezer or cooler and it will chill right away! They are made out of solid aluminum in Edmonton Alberta on a CNC machine so they are unbreakable, you can actually park a truck on them. However, they are hand wash only because the dishwasher will take away the shine. The patterns on the outside also are very unique and each one is slightly different!!!