I wish I knew where to buy them earlier instead of sundried tomatoes in the jars…  They are coming dry, in plastic buckets or bags and look just like on the image above.

You can easily rehydrate them yourself soaking in boiled hot water overnight or for couple of hours before use (especially useful for salads). You can even add them dry to the pot if you are cooking your dish.
If you wish you may add later a little bit of olive oil to the jar, but it is not necessary.