Keep your drinks ice-cold or piping-hot for longer in the RTIC Coolers 18 oz. Stainless Steel Double Vacuum Insulated Bottle. It has double wall vacuum insulation that seals in the temperature to keep drinks hot longer while it preserves ice for up to 24 hours and keeping drinks cold for hours! The heavy-duty lid has an air tight lid which locks in the cold. Durable and easy to clean this bottle is a perfect option for bringing your drink along wherever you may be going!Double wall vacuum insulation for maximum temperature retentionExtra wide opening for easy filling drinking and cleaningKeeps drinks cold drinks colder and hot drinks hotter for a longer period of timeHeavy-duty lid has an air tight seal which locks in the cold while providing an easy to carry loop top100% leak proof cap provides a three finger gripNo sweat exterior stays dry so you wont need for a coasterStrong and reliable 18/8 stainless steel construction