Silicone mold of a crinkle cake/tart have for resin, polymer clay, wax, soaps
Silicone options 
Clear for resins
or
Mint green which is heat resistant up to 450°F(232°C) and is suitable for polymer clay, resin, wax, gypsum and concrete 
Style options sizes are approximately 
Bigger 22mm
Smaller 15mm
See other photos for style numbers 
Please be aware of size before you buy please:)