For approx 1 oz shot glasses, food grade silicone, safty, durable and easy to use. Fill in water or any drink mix, put in freezer and let liquid freeze, pop out four frozen shot glasses.Two side both can use for making different shapes. Two kinds available: square one and rectangle, same prices. They are perfect for serving whiskey, cocktails, vodka, and any other drink you have in mind. Also use wine chiller ice mold to chill your glass of wine with small cups shaped ice cubes. Perfect gift for Housewarming, Birthdays, Anniversaries, Easter, Christmas, Independence Day, New Year, and any other occasion.