Food Packaging: How plastic totes conquered spinach

September 9, 2003
/ Print / Reprints /
/ Text Size+

Reusable totes used to transport Savoy spinach undergo washing and sanitizing in Green Bay, WI, before going back out into the field.
In the not-so-distant past, Savoy spinach moved from farm fields to supermarket shelves in wooden bushel baskets. Rather than risk contaminating their fields with mold or fungus residing in the wood, producers typically tossed the containers away after one use.

Five years ago, major producers of the curly leafed specialty crop approached Rehrig Pacific Co., a maker of molded plastic containers for food and other products, seeking a reusable tote that could be loaded in the fields and quickly cool the just-picked lettuce in high-volume operations. Rehrig officials recommended that the growers retain Tosca Ltd. to manage a program in which totes would be returned to Green Bay, Wis., washed and sanitized, then shipped to either the Northeast or Southwest, depending on where the next crop was to be harvested. Tosca had its start as a maker of reusable containers for 640 lb. blocks of cheese to replace wooden crates that were abandoned because of food safety concerns.

Tosca managers asked Madison, Wis.-based Sani-Matic Inc. to devise an automated wash tunnel to clean and sanitize the totes that Rehrig was designing. “They actually designed and built the machine before the container was even being produced,” says Curt Dhein, Tosca’s plant manager. The 65-ft. tunnel includes five sections, beginning with pre-wash and continuing through detergent wash, recirculating rinse, final rinse and sanitizer. A camera imaging system was developed to ensure the lids on the crates are correctly oriented for automated harvesting operations.

Tosca maintains an inventory of almost 300,000 totes to serve the Savoy spinach growers, Dhein estimates. More than 90 percent of the U.S. crop makes its way to market in the crates today, he adds.

For more information:

Bill Widman, Rehrig Pacific Co., 800-421-6244

Steve Ver Keilen, Sani-Matic Inc., 800-356-3300,

Curt Dhein, Tosca Ltd., 920-465-8534,

Did you enjoy this article? Click here to subscribe to Food Engineering Magazine.

Recent Articles by Kevin Higgins, Senior Editor

You must login or register in order to post a comment.



Image Galleries

Fabulous Food Plant: Paramount Citrus

Learn more about this fabulous food plant in Food Engineering's article, found here.


Burns & McDonnell project manager RJ Hope and senior project engineer Justin Hamilton discuss the distinctions between Food Safety and Food Defense as well as the implications for food manufacturers of the Food Safety Modernization Act.
More Podcasts


Food Engineering Magazine

Food engineering magazine 2014 april cover

2014 April

Catch a preview of the Powder and Bulk Show in this April 2014 edition of Food Engineering. Also, be sure to check out a coffee stick making a real stir and a major advancement in the the pet food industry.
Table Of Contents Subscribe


Food Authentication Using Bioorganic Molecules

This text provides critical tools and data needed to augment routine food analysis and enhance food safety by aiding in the detection of counterfeit, and potentially deleterious, foods.

More Products

Clear Seas Research

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications,Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

Food Master

Food Master Cover 2014Food Master 2014 is now available!


Where the buying process begins in the food and beverage manufacturing market. 

Visit to learn more.


FE recent tweets