Double-wall insulation design, Temperature control prevents your hot drink from getting cold or your cold drink from getting warm. Keep your cold drink cold for up to 12hours and your hot drink warm for up to 6 hours. Made of high quality food grade 18/8 stainless steel. Durable, rust proof and sweat free design. All of our products are made to order. Please allow up to 7 days maximum before shipping. You can always reach out and ask for an estimated shipping date. We appreciate your business! Please pay attention to your inbox just in case any adjustments or corrections need to be made in order to avoid any shipment delays.