4mm thickness For bottle/beer / wine/lunch Glue bottom Great for outdoor activity 1.Can keep cool/warm 8 hours2.Neoprene material3.Silkscreen ... high neoprene environmental protection foaming rubber to make non-toxic5. Can make any of the customized size and printing design6. Available ... ,FI.Orange,FI. Green,Cyan,Teal,White,Black,etc...7.Can cooler is used for keeping beverag