Lettuce and other fresh produce stays fresh longer

In our house, we usually eat a fresh mixed salad 2-3 times a week which consists of lettuce, cucumber, peppers, tomatoes, radishes, etc. and due to me working full-time, I only go shopping once a week. Lots of produce does not stay fresh that long which is quite annoying.
Not that long ago I went to a tupper ware party and found out that tupper sells a container called FridgeSmart containers. Those containers keep vegetables fresh much longer so I did buy one.
Carrots keep a lot longer like 2-3 weeks even, also cut up peppers and fresh lettuce keeps at least a week in those containers.

I am usually not a tupperware fan, but this container was really worth the money as they keep my produce fresh longer which is great.

Again, they are called FridgeSmart containers.