KUER cooler series B includes 10/20/35/45/75/110qt, 70/110qt cooler with wheels.Various sizes to meet your various needs.Rotational structure of integrated products, high strength, solid and durable,extra thick closed-cell foam insulation,can keep your things cold for 5-7 days.Built-in two bottle openers made of stainless steel one on each side of the lid.The unique design of pressure relief value makes it easier to open the cooler box, especially when the internal and external air pressure is out of balance.The overall rounded style of the cooler.