100% Polyester Made from high-quality thermoplastic Extra large filler thread (29mm) for safe filling Material is environmentally friendly, odorless and recyclable Made in Germany Description: Original fashy hot water bottles. Proven for decades. Highest quality in a wide variety. Made from high-quality thermoplastic. Extra large filler thread (29mm) for safe filling. Due to Fashyâ€s developed closing technique, no rubber seal is necessary. This is an integral molded hot water bottles with seamless processing at the neck of the bottle. Material is environmentally friendly, odorless and recyclable material odorless and recyclable.