A 400ml water bottle is a compact, small-capacity bottle typically used for short trips, children's school bags, quick errands, or as a desk accessory.1

The phrase "Unisex Water Bottle" simply indicates a design that is neutral or appeals to all genders. The note that the "Color May Vary" is a standard disclaimer for products sold in bulk or online, meaning you may receive any color available in stock (e.g., black, blue, pink, green, silver, etc.).

Here is a summary of what you can generally expect from a 400ml water bottle, based on common features in this size category:

Key Features and Use CasesFeatureDescription & BenefitsCapacity (400ml)This is approximately $13.5$ fluid ounces. It's an ideal size for children (fits easily in lunch boxes/backpacks) or for minimalist adult use (fitting into small purses, bags, or coat pockets).MaterialThey are commonly made from: Plastic (BPA-free/Tritan), Stainless Steel (often insulated), or Glass (often with a protective sleeve).InsulationDepending on the material: Insulated stainless steel models will keep drinks hot or cold for hours, while plastic/single-wall bottles are lighter but offer no temperature retention.PortabilityDue to the small size, they are extremely portable and lightweight, often featuring a carrying loop, handle, or slim profile to fit in car cup holders or small backpack side pockets.Lid/Cap StyleCommon types include: Screw caps, Flip-top lids (for easy one-handed drinking), or Straw caps (popular for kids and gym use).DurabilityMost are designed to be leak-proof and shatter/break-resistant (especially plastic and stainless steel versions) for everyday travel.

The key takeaway is that the 400ml capacity defines this bottle as a lightweight, compact choice for short-term hydration, rather than an all-day bottle.