Servicing Construction, Demolition, Businesses, Commercial & Industrial Companies. Roll Off containers are used on both a temporary and permanent basis. Gainsborough Waste can supply roll off containers in the following sizes - 15, 20, 30 and 40 cubic yards; a size for all needs. Texas Outhouse provides portable toilets throughout the greater Houston area to construction sites, chemical plants, pipeline jobs, highway jobs and special events. Selections from Standard Portable Toilets To Luxury Restroom Trailers. rompt, courteous service is our top priority. We have a large selection to meet your immediate needs. Our Special Events Division is ready to help you plan your next event with a air-conditioned restroom trailer. From start to finish we can make it happen! Portable Toilets, Tank Cans & High Rise CansRestroom TrailersHand Wash Sink StationsLuxury Restroom Trailers