One thing I learned when I was planning ahead to open a store at Wagglepop the first time around ... the Name of your store might be just enough to get you the better ranking!
Items specific to the name is the best way to go!
HOWEVER, I am beginning to wonder about whether it is actually better to have 5 stores each with less then 100 items in it or 1 store with 500 items. I wonder this because my mens store has over 500 items and does great on ecraters. My womens store and formal dress store both with about 100 items or less don't do nearly as well. My jewelry store with only about 20 items --- lol, it does nothing - rarely even gets hits!
I do belive that your neck coolers are strong enough to stand on their own. Get that store open! lol! You need help, you know how to find me. I can't believe you haven't already done this!