Best-selling, viral puzzle toy that stimulate dogs’ brains to support healthy growth. Fill with wet treats and freeze for long lasting challenge. Interlock SM+L or L+XL together for a treat dispensing puzzle toy your dog can chase Doubles as a slow feeder for wobbly, scatter feeding enrichment Top-rack dishwasher safe Safe and Non-Toxic. Absolutely no BPA, Latex, Phthalates, or Silicone Made with zero-waste and recyclable Zogoflex® material in Bozeman, Montana