I buy baking soda by the bag at Costco. I have one in the laundry room but don't need it taking up space in the kitchen and each bathroom. After washing and drying the plastic containers from flavored coffee creamers, I slit the labels to remove and mark the bottles accordingly with a Sharpie. They're easy to fill with a funnel and the pour top allows me to sprinkle as needed. There's one under each sink and the big bag is convenient for refills on a shelf in the garage.
By Debbie from NJ
I finally realized emptying a box of baking soda into an empty washed out spice container sure keeps it easier to use when needed, and keeps it fresh a lot longer.
The picture shows my baking powder is still good, even though it is slightly past the expiration date.
Today I was out shopping and bought a 12 lb re-sealable bag of Arm & Hammer baking soda at Sam's Club. It cost $4.77.