The bottle has an 18/8 stainless steel construction with an exclusive powder coating is comfortable to grip without slipping. It has a double-walled vacuum for insulation that can keep your beverage hot or cold for up to 24 hours. It comes with a choice of 2 different caps, one standard cap and another with a straw, plus has an opening size of 4.8cm for easy filling and cleaning. Capacity 0.5 litres.