S'well Roamers features a triple-layer vacuum insulated construction designed to keep drinks cold for up to 24 hours or hot for up to 12. Made of 18/8 food grade stainless steel with a superior construction that allows for easy refilling and reuse to reduce the need for single-use plastic water bottles. Features a sleek silhouette, making it the ultimate companion for every outdoor adventure. Pair it with S'well cups for the perfect picnic gift. BPA free and reusable. Hand wash only. High-grade 18/8 stainless steel. BPA free. Triple walled for maximum insulation, leaving no condensation on the outside .