The water bottle from Estia is made of stainless steel material that does not break or rust over time. Due to its material, it is not affected by acidic drinks such as fruit juices, unlike aluminum. Additionally, it is also a thermos which has the ability to maintain the temperature of the liquid for a long time, such as in the summer at the beach. It also features a straw for easy and controlled flow when the child drinks. Its material has technology that does not contain the harmful chemical substance BPA, making it safe for liquids.