700-6 Cavity Wax Melt PET Plastic Clamshell is the most popular size used in the candle industry. It is made of rPET, a truly recyclable version of PET. Many candle clients successfully pour wax at temperatures of 140°F or lower in the rPET clamshells. These candle wax melt molds are ready for retail or gifts and perfect with a hangtag hole for easy display. The clamshell lid folds snaps into place and is attached to the base. Each cavity mold holds 3 fluid ounces.