The 40oz Stainless Steel Insulated Flip Straw Tumbler is designed for maximum hydration and convenience. Made from durable, high-quality stainless steel, it features double-wall vacuum insulation to keep drinks cold for up to 24 hours or hot for 12 hours. Its flip straw lid allows for easy, spill-resistant sipping on the go, while the large 40oz capacity ensures fewer refills. The tumbler fits most car cup holders, is BPA-free, and comes with a comfortable, ergonomic handle for easy carrying