Color Changing set of 2 double Wall tumblers

Set of 2 (4) double Wall tumblers + 4 (8) reusable straws. Glacier to sky color changing Sky to ocean color changing Glacier to orchid color changing Orchid to violet color changing Works best with ice beverages External temperatures may affect starting color Use warm water to return to starting color Hand wash only Do not microwave Each tumblers 22 oz/660mL