Food Grade Silicone;each Rectangle cell size:8cm x 5.4cm x 2.4cm(3.1"x2.2"x1" );it can hold appro.110g waterHeat Resistant Temperature -40 to +230 Centigrade (-40 to 446 F)Color:Send randomly if no special note(Most is Pink)Flexible and Reusable; Dishwasher-， refrigerator-， freezer- and microwave-safe