So. I'm experimenting with these salad-in-a-jar things I saw online. So far I am loving the concept way too much.
For the jars themselves you just need large mason jars (and the wide-mouth ones are probably best. I don't have those, but meh) and some reusable mason jar lids.
The key to these is to layer things so that nothing gets squishy. My first round:
- Dressing (I put Caesar, Balsamic vinaigrette, and olive-oil-and-vinegar in the bottoms since I needed to use those up.)
- Veggies that chop well and marinade well (I put carrots, tomato, onion, and a layer of cucumber) until they pile over the dressing
- Greens (Spring herb mix and raw coleslaw/shredded cabbage for me)
- Toppings and additives (I put a square of queso fresco, some cooked and chopped turkey meat, a slice of lime, and chopped cilantro on top)
Seal it up and it should stay long enough to eat them up if you are trying to eat a salad a day.

I'm still experimenting to see how long they hold up for, but so far it's been a really awesome way to buy groceries, assemble salads all at once, and then Bam! Instant-ish salad. If they hold up for 5 days I'll be a very happy camper.
An alternative thing I made this morning and ate this evening:
- Shredded cabbage, radishes, and carrots in the whole thing
- Chopped cilantro
- A dressing poured over it to marinade (Juice of a lime or lemon, equal it with olive oil, and add some sugar, salt, pepper, and garlic powder)
Throw the stuff on top, shake up the jar, let it sit in the fridge all day, and top sandwiches/burgers with it instead of traditional lettuce/tomato.