4.non-, more healthy and safe . 2.Simple, elegant but fashionable design, great for your taking out. 3.More , easy to carry, timely replenishment of water . 1.The water bottle is simple, elegant but fashionable design, great for your taking out. You can put 2500ml water in it, but not suitable for hot liquid, when you go out for exercising, climbing mountain, camping, running and etc. 5.With push cap, very firm, not easy to leak water.