The Maars Maker 20 oz tumbler is the perfect get-along for any excursion or casual day out. Made with double-wall, food-grade stainless steel, these tumblers keep drinks hot for 12 hours and refreshingly cold for a stunning 24 hours. The powder-coated exterior with its smooth matte finish is a pleasure to the touch while the non-tapered shape with the slim design make it highly practical and stylish. The plastic screw-on slide lid with the color-matching straw add extra practicality points. All materials used for this tumbler are non-toxic and BPA-free.