"We call it 'modified atmosphere packaging' but you can call it profitable." That's how Mission Produce Inc. describes its MissionRIPE(TM) corrugated shipper in literature it sends to the foodservice and supermarket trade. Elsewhere Oxnard CA-based Mission uses words like "revolutionary" "patented" and "exclusive." All this to describe what appears to be a pretty ordinary-looking kraft box. The Tamfresh(TM) box however is anything but ordinary. Developed originally in Finland it's now available through Pacific Asia Technologies (Vancouver British Columbia Canada). With a specially developed semi-permeable membrane it provides another twist on MAP technology. Because the corrugated board incorporates this membrane in its inner liner it controls the exchange of gases specifically oxygen entering and carbon dioxide exiting. The result: a MAP system that extends the shelf life of whole produce by slowing down the ripening process. Believed to be the first to use Tamfresh technology in North America Mission codes its boxes of avocados for three weeks from date of packing.