Cleaning Supplies
At supermarkets, cleaning supplies can be so overpriced that it gets frustrating. At the dollar store, you can find all kinds of expensive and popular brands like Tide and Clorox for more than half the normal price.
Cookie Sheets
Another blogger, the Crazy Craft Lady, has said that she buys her cookie sheets at her local dollar store, so we can trust her. They can be used for all kinds of things like DIY and other things in the kitchen as well.