You have found a source for making probiotic beverages.
Milk kefir grains will double in size in a few ferments. They make wonderful kefir milk! You get 1 Tablespoon (3 teaspoons) of grains to make your first 2 cups of kefir. $10 or I am also willing to trade for things like herbs, potted plants and home grown veggies.
Kefir is something you can make at home for the cost of milk. You need no fancy equipment. All you need is a glass jar, milk, and some real kefir grains.
do NOT contact me with unsolicited services or offers