Knief & Co. – A step ahead in design, Creativity and production for tomorrow’s solutions About Us: Knief & Co. is situated in Bremen / Germany and was founded in 1979. With regard to freestanding bathtubs, our family owned company has over 20 year experience in specialized acrylic as well as 10 years in solid surface production. Using only best raw materials, with our accumulated know-how and outstanding quality we are recognized as the market leader for acrylic freestanding bathtubs and solid surface architecture, fulfilling highest quality parameter and individual customer requirements.