Dollar Tree Rinse AidI found this 8.45 ounce bottle of rinse aid at the Dollar Tree. The same size bottle of Finish brand rinse aid is $3.77 at Target, the lowest price I have found. There has been absolutely no difference in the performance. I don't always see it, so I buy several bottles when they are in stock.
Saving Money on Baking SodaI buy baking soda by the bag at Costco. 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.