All bottles comes with the stainless steel quality and made from 18/8 stainless steel on the outside, 100% stainless steel | | light weight & long lasting paint, bottles are made up with stainless steel. Is durable & light weight. Experts recommend stainless steel, rounded corners are easy to clean with no hard angles where dirt, germs or bacteria can stick. Easy to carry & spill proof, deal for keeping yourself hydrated all day long, easy to sip & pour, easy to carry at any place & time .comes with a built in handle for ease in carrying, this is not hot & cold bottle. This is a normal stainless steel bottle, it is suitable for any occasions like hiking, cycling, camping, gym, car, office or home. Wide mouth open conveniently for ice cube insertion. You also can add coffee, tea, warm drink or other beverage. Can be used to store water in fridge or carry in bag during travel, morning walk or gym. This water bottle is a great gift for family or friends.