Dregs waiting in bottle

[TastyAdventure]

I drank a bottle I want to save the dregs from like 6 days ago. After I poured it (left about 1/2 of beer) I flamed the mouth of the bottle, flamed some aluminum foil and put it over it tightly. I have not added any wort yet. Are these dregs still good to use?

 

[phendog]

The price to find out is just a small starter. Do one with the dregs and see if the yeast propagates.