Twistshake’s Hot or Cold –Insulated bottle with a 420ml capacity is made of the highest quality stainless steel. The slim designisperfectfor your Twistshake drinks and your nursery bag! Keepyour drinkshot or cold for up to 10 hours, thanks to our doubled wall stainless steel design.The bottle is protected by asuper softrubber coatthat fits perfect in your hand.The wide opening makes pouring super easy. Dish your Hot or Cold bottle,before first use. Shake and wipe the lid after wash since water can gather inside of the lid.Do not freeze or use in microwave oven.