Good question...
I made the move a couple years ago to buy a Rubbermaid "sandwich keeper" box. It's one of their products that's used to store leftovers, and it's more rectangular (bigger than a sandwich frankly).
Anyway, it snaps closed and is great for holding up to about 7-8 gloves at any time. Allows me to rotate them and also... here's the biggie.... they stay dry if it's rainy out and definately keeps them "fresh" between uses. And I'll tell you what, it's lasted me much longer than a Ziploc.