Healthy & Environmentally : Made of PET material, healthy, non-toxic,environmentally friendly and tasteless. the wax pour temperature for these wax molds is up to 140 ° F (60 ° C) Clam Shells:They are extremely sturdy, durable, close tightly, easy to separate and open fairly easy.has a long service life. It is not easy to be damaged after normal use. It can be reused Perfect Size: Each clamshell molds is 4.45 x 3.1 x 1 inch and the thickness of the plastic is 0.5mm,with a total of 6 cube, each cube is 1 x 0.94 inch, and the total capacity is 2.4 ounces Characteristic：These wax molds does not interact with the wax or dye and affect the quality of the wax cubes, perfect for all types of wax or soap Diy Making Wax Melts: If you are trying to make your own wax melt cubes or melt down existing candles to convert for your wax melters, these work great.