The Rivacase 90311BK is a practical vacuum flask designed to keep your favorite drinks at the right temperature throughout the day. With a 500 ml capacity, it maintains heat for up to 8 hours and keeps liquids cold for up to 12 hours, making it a reliable companion for a long workday or an outdoor stroll. Its construction features double walls made from 18/10 stainless steel, paired with a silicone interior and a durable plastic exterior in a matt black finish. The design is rounded out with a rubberized bottom for added stability and a secure screw-on lid equipped with an on/lock button to prevent accidental leaks. Weighing 494 g and measuring 110 x 110 x 155 mm, this compact bottle fits easily into a bag, while the light gold logo adds a subtle touch of style for anyone who values both function and a clean aesthetic.