The Loops In The Frame Of A Grocery Cart. The grocery cart, of all things we use in our day to day life, should certainly be the most self-explanatory, or at least one would think. Sometimes the purpose of everyday items get lost amongst its main function, which in this instance is to carry your groceries around while you shop. The manufacturers of these seemingly basic carts are more forward-thinking than we’ve given them credit for, though. While even our checkers and baggers don’t know it, there is a purpose behind those metal loops that frame the top fold out section of our grocery carts; to hang your bags with light items like bread and eggs from so they don’t get smashed among your heavier goods. Do your grocers a favor and show them how it’s done next time to make their lives easier.