Premium 18/8 stainless steel construction ensures durability and superior temperature retention for both hot and cold beverages. Double-wall vacuum insulation keeps drinks hot for 12 hours or cold for 24 hours without condensation. Flip-up straw design with leakproof silicone seal for spill-proof convenience during travel or commuting. Ergonomic handle provides secure grip while driving, hiking, or outdoor activities. Food-grade 304 stainless steel interior resists odors and stains for easy cleaning. Brushed finish with laser-engraved markings for scratch-resistant elegance. Fits most standard cup holders in cars and bicycles. Ideal for office workers, travelers, gym enthusiasts, and outdoor adventurers. Commercial-grade quality at wholesale pricing for bulk purchases.