Futureexpectation brand tumblers, which are stainless steel vacuum-insulated mugs designed to keep beverages hot or cold.They feature a large capacity, commonly around 710ml to 750ml, and include a handle for easier carrying.The tumblers are advertised as leak-proof and suitable for use in offices, sports, travel, or home settings.Available color options in this style include pink, white, black, blue, and gray