The City of Watsonville is looking to expand a ban on polystyrene products. The city council voted yesterday to develop a plan that would extend a current law to prohibit products sold in retail stores. The city banned polystyrene take-out food containers in 2009. Officials say even though the ban on the food containers, as well as another on plastic bags has helped decrease the litter problem, more still needs to be done. So far, Capitola and the City of Santa Cruz have already adopted similar bans.