I haven't tried those but I do have the Tupperware Fridgesmart products and am always amazed at how long produce lasts when stored in these containers.

A head of leaf lettuce lasts for weeks in one of these. Tupperware is washable and reusable for the life of the product -- not sure how many times you can reuse the green bags?

They can be pricey but a little bit less on eBay.

Tupperware - the official World Web Site for Tupperware Products

Maybe someone else has tried the green bags... Just wanted to say what works for us.