Soap molds are manufactured from 0.060" thick white high-impact polystyrene plastic. The material is food safe and FDA approved. They may be used for molding hot- and cold-processed soaps as well as melt-and-pour. These molds get my two thumbs up for durability, design, all but self-leveling (a few singles required the rice box), and they unmold easily with M&P (no wrestling match required). Don't overheat your melt-and-pour. Always try to melt on a medium setting if using the microwave. It takes a bit longer, but your soap will be happier and so will you when it comes time to unmold. Let them totally cool or leave them overnight. No refrigeration or freezing was necessary with my tests. But, you must let them cool much longer than other molds. CP & HP: Let them sit longer than other types of molds. This is a thick dense plastic that gives great results if you don't rush them. White polystyrene molds will withstand temperatures up to approximately 180 degrees. Cavities: 4 Soap Size: 3.75" x 2.625" x 1.25" Soap Weight: 6.7 oz ELFBrdrectcvsmRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: Up to 5.4 oz Finished soap by pjsoaps.com Soap Size: 3" x 3" x 1.25" Plastic: White Polystyrene ELFCherblos4wpRegular price: $6.85Sale price: $4.79 4 Cavities - 2.3 oz each Dimensions 2.5" x .75" soapylovediagstripedhrtRegular price: $6.85Sale price: $4.79 6 oz - 4 cavity White Polystyrene Finished soap by pjsoaps.com 3.625" x 2.375" x 1.25" ELFEyehor4wpRegular price: $6.85Sale price: $4.79 Cavities: 4 Dimensions: 3"x2"x0.875" Soap Weight: 3.3 oz ELFGuestOctagonRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: 3.2 oz Soap Size: 3"x2"x0.875" ELFGRectRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Size: 3"x2"x0.875: Soap Weight: 3.2 oz ELFGRoundedRectRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: Up to 6.9 oz Soap Size: 3.75" x 2.625" x 1.25" ELFOctagonalRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: Up to 5.6 oz Soap Size: 3.75" x 2.625" x 1.25" White Polystyrene ELFOrlongknot4wpRegular price: $6.85Sale price: $4.79 Cavities: 4 - 4.3 oz each Dimensions: 3.25" x 3.5" x .75" ElfPumpkinRegular price: $6.85Sale price: $4.79 4 cavities 2.3 oz each Dimensions 2.5" x .75" soapylovescallopedrndRegular price: $6.85Sale price: $4.79 4 Cavities 4.2 oz each 3.25" x 3.5" x 1" soapylovescallopedhrtRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: Up to 6.2 oz Finished soap by pjsoaps.com Soap Size: 3.625" x 2.375" x 1.25" White Polystyrene ELFSWbears4wpRegular price: $6.85Sale price: $4.79 Cavities: 4 Soap Weight: Up to 5.6 oz Soap Size: 3.75" x 2.625" x 1.25" White Polystyrene ELFSWconcho4Regular price: $6.85Sale price: $4.79 6.6 oz - 4 cavity White Polystyrene 3" x 3" x 1.25" ELFSquare4wpRegular price: $6.85Sale price: $4.79 4 Cavies - 2.5 oz each Dimensions: 3.25" x 1" soapylovestackedstarRegular price: $6.85Sale price: $4.79