Hydro Flask's unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure. Refined shape is comfortable to hold and rests perfectly in your hand. Savor every sip, whether you’re on the patio or at the campsite. Press-in lid features Honeycomb Insulation for additional temperature control and an opening for easy sips. A splash resistant way to transport your beverage. Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transfer—and the durable construction stands up to whatever life brings.