CorkPops - Nicholas Stainless Steel Ice Martini Stirrers, Set of 4 Set of 4 double walled swizzle sticks made of food grade stainless steel and filled with liquid freezer gel These chiller stircicles have smooth edges so they won`t crack your glasses Place martini sticks in freezer for about four hours before use After using, simply rinse, dry, refreeze and reuse Sticks measure 6 inches