Costco has plenty of deals that members rave about -- from its beloved $4.99 rotisserie chickens and $1.50 hot dogs to those giant Costco sheet cakes and bargain wines. In addition to affordable ...

The case holds 40 bottles with a total volume of 5.3 gallons (20 liters), so I'm spending nearly $1 per gallon. By comparison, I can fill an entire five-gallon jug at the water refill station for ...