I find taking the bag they come in then add at least one more heavy well sealed plastic bag after you seal bag they come in from any air leaks. You can use glass jars and then your golden along with a good lid is another cheap option.
Keep them in a cool place out of lighting/sun.
They don't go...
@xtsho
What do you suggest for 5 gallon fabric pots with soil in terms of amounts and timing to feed microbes with molasses?
I have been adding 1/2 teaspoon every other watering. I use that in 5 gallon water to feed 10-15 plants.