Stock up on plant-based replacement heads for your sustainable electric toothbrush. When they’re worn out, send back these toothbrush heads for recycling, for free.. Buy the SURI Sustainable Electric Toothbrush here.. Plant-based heads made from cornstarch, with medium soft castor oil bristles. Return used heads for free after 3 months - simply pop in the post on a plain envelope, with FREEPOST SURI written clearly in capitals. Medium/Soft 3DWave™ bristle technology for optimal interdental cleaning. Uniquely positioned firm and soft bristles made to remove plaque and food easily from teeth and gums. Designed to last. Responsibly made in China and carbon neutral. The SURI electric toothbrush is the sustainable solution we’ve waited years for. Not only are the plant-based heads recyclable, the durable aluminium body is designed to be taken apart and repaired. That means no plastic sent to landfill, ever. When billions of toothbrushes are thrown away every year, SURI’s elegant solution is one that just makes sense. And unlike other natural toothbrushes we’ve tried, the SURI is never a compromise. It’s powerful, quiet and designed for optimal interdental cleaning - dentist approved. And on the off-chance it’s not for you? There’s a 100-day money back guarantee, no questions asked.