Hand Soap
Target and Costco have the same brand of hand soap: Softsoap Advanced Clean Liquid Hand Soap Refill, which is a couple of cents cheaper per ounce at Costco, but you will need to find some extra space for those big bottles. In this case, Costco is the winner, as you can find hand soap there for $8.99, but you get to buy two 80-fluid ounce bottles.
Deodorant
You know what they say: you stock up, you definitely save. Costco has multi-packs for men’s Gillette Endurance and ladies’ Secret Outlast, and both deodorants will be way cheaper than the individual or twin packs you’d get at Target.