Built solid sturdy and portable stanley mugs are the best choice when you39re in need of a quick drink on the go push button lid open drink and close with one hand 188 stainless steel won39t rust and naturally bpa free vacuum insulated body and thermal lid keeps drinks hot for 4 hours and cold for 20 hours dishwasher safe lid diassemble for deep cleaning leak proof and fully packable box contains 1 x vacuum mug