Typically, you’ll find a restaurant's grease disposal containers in the back of the eatery near other waste bins, but it's always best to ask for permission before using them.
if it would be okay to drop off your grease and cooking oils from time to time. Take note of the rules and regulations on the proper disposal etiquette.
Not every restaurant will let you dump your grease on them, but many will because they often receive incentives and payments for recycling large quantities of cooking oils.