Salad in a jar?

Source: salad-in-a-jar.com via Heather. on Pinterest

Have you seen this way to prepare salad for a whole week? I think Paula over at Salad in a Jar is on to something.

I'm super interested to try it since I'm really good at buying lettuce and really bad at preparing it as often as I should :)

I also appreciated this post by Paula about deciding if food should go in the waste or on the waist.