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Sports Water Bottle, Duntun Bucket & Plastic Space Cup Sports water bottles, duntun buckets (large-capacity water containers) and plastic space cups are popular among sports enthusiasts for their large capacity. They are usually made of food-grade materials like Tritan, which are safe, odorless, and resistant to cold and heat. With a capacity ranging from 1.5L to 3L, they can meet the daily water intake needs. In design, most have one-click flip lids and leak-proof locks, paired with dual drinking modes (direct sipping and straw), ensuring easy and leak-free use. Additionally, they often come with portable handles or adjustable shoulder straps, and the bottle bodies have scale marks and time markers, combining practicality with fashion. Some space cups also feature a sci-fi-inspired design, making them ideal companions for sports and commuting.