We were given a yogurt maker and are planning on trying it out this week. But I wanted to find out how long it is good? I am assuming it will keep 3-4 days, since it doesn't have all the preservatives to prolong its shelf-life like store bought? It really isn't an issue since I have 2 that will eat multiple containers a day if I let them, but want to know just to be on the safe side. Thanks!