We purchased 12 moldable plastics from Amazon.com that were advertised for modeling and dental applications (Table ). We reviewed each plastic's product page on Amazon.com and the vendor website (if applicable) for details about the plastic. Descriptions and information on the polymers were limited. Many of the plastics were described in vague and generic terms such as "polyester", "white beads", "thermoplastic polymer", "shapeable resin", and "thermoplastic beads". Only a few products had readily available safety data sheets (SDS) that were accessible to download on the product page or vendor's website. None of the plastics advertised for dental applications had SDSs. According to the few available SDSs, the materials were PCL. Additionally, PCL is listed as the preferred embodiment material in the patent describing the use of moldable plastics to fashion dental prosthetics. Therefore, we initially assumed that all moldable plastics on the market were PCL. According to reviews, customers also believed that these materials were PCL. However, they noted differences between products. For instance, one reviewer stated that, when melted, JXE JXO plastic was "stickier" than Instamorph plastic, suggesting that it might be a different polymer.