do you remember the days when the impulsebuy racks at the grocery shop only offered gum, celebrity gossip magazines, and toys these days, onetimeserve drink coolers are taking up considerable &ldquofrontofstore&rdquo real estate at convenience stores, drug stores, grocers, mass merchandisers. this is due to a seemingly universal and strong demand for a great range of getandgo drinks. sales facts prove the point. last year, organizations adjusted to the trend of convenience achieved high rewards.