Introducing the LAPEN 500ml Vacuum Bottle with Flip Top Lid – made for effortless one-hand hydration. Flip Top Lid for easy, quick access. 500ml capacity. Material: 304 stainless steel inside, 201 outside. Insulated: Cold up to 48hrs, hot up to 12hrs. Leak-proof and sweat-free exterior. Lightweight and easy to carry.