Show off your highly evolved sense of humor with Fred Brain Freeze Ice Tray. Each tray makes four large (about 1.75”x1.25”) frosty braincubes. Need directions, smarty pants? Just fill with water and freeze – run hot water over the back for easy release. Brain Freeze Ice Trays are made of food grade silicone that withstands temperatures of -58°F to 446°. Designed by Chris Haines. Hand washing is recommended.