A box of DUZ washing powder is seen on Lucy Ricardo’s kitchen counter in the kitchen set of I Love Lucy. Duz is a discontinued brand of Proctor & Gamble , it began as a powdered laundry soap and later, a powdered laundry detergent.  there were promotional glassware and plates in each box. it was last made in 1980

Duz was a popular brand name in the 1950’s. Below is an original commercial for Duz Laundry Detergent that aired in 1953. There is actually a  full unused vintage box of DUZ for sale on eBay currently:  http://www.ebay.com/itm/Vintage-Duz-Granulated-Soap-Box-1lb-4-5oz-Full-Puncture-/261994886163