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Sized for small hands, the REI Kids' stainless-steel water bottle is perfect for walks in the woods, field trips and school lunch. Bottle is made with premium stainless steel that is toxin free; inner surface is finished with an electrolyte charge and dolomitic sand blasting; finish is completely BPA free. Certified food-grade polypropylene threaded opening and screw-top lid create a spill-resistant seal. Easy-to-use sip top enables drinking on the go; loop on lid lets you clip bottle to a bag with an accessory carabiner, sold separately. Food-grade silicone gasket is used inside the lid to help prevent leaks. Thread pattern is compatible with many thread-on adapters for popular backcountry water filters. Food-grade polypropylene base adds protection from dents caused by dropping the bottle. Hand wash only; do not microwave or put in freezer. Please note: REI Kids' stainless-steel water bottle is not designed for use with hot liquids.