I know, a lifetime sounds like a while huh? Well, we've built muggi to outlive you and your children's children so we can safely say it's built to last. Use a muggi for what it's designed for and we'll guarantee it for 88 years! If your muggi doesn't stand up to everyday bumps, drops and knocks then we'll replace it for free, no questions asked. Love your muggi and it will love you, forever!