Insulation: Most versions use double-wall vacuum insulation to maintain drink temperatures—keeping beverages cold for up to 24 hours or hot for up to 12 hours.
Design: They typically feature a large handle, a screw-on lid with multiple positions (straw, wide mouth, or full cover), and a base designed to fit standard car cup holders.
Capacity: Standard size is 40 ounces (approximately 1.2 liters).