Look for sodium bicarbonate. You will find it is sold in much more bulk pakadgeing for industrial use. So no need to buy boxes and boxes of it. I have a 25 gallon tub of it in my shop for just in case.I believe lots of baking soda mentioned before so I'll add another item to the list.
POUNDS of baking soda LOL
By the way sodium bicarbonate is simply the scientific name for baking soda. I can usually find it in bulk for less cost than boxes and boxes of baking soda at the grocery store.