Safety - What concerns us most about the water bottle is the safety issue, our rainbow water bottles are made of food grade 304 stainless steel, BPA free and 100% non-toxic, feel relieved about usage, please. Proper Size - 500ML/17oz capacity, lightweight, meet your daily needs, easy for holding in hand, and it’s perfect for your gym bag, car cup holder, bicycle and backpack when you enjoy your travel, yoga, Hiking Camping and other outdoor sports. Easy to clean - you can fill the insulated water bottle with any drink you want, cold water, coffee, fruit juices, smoothies, carbonated beverages, wine and so on, so maybe there is some smell in the bottle, just clean it with mild detergent.