Meet your new favorite water bottle! The TempPro 40oz flask is built tough with durable stainless steel and has double-wall vacuum insulation (they call it TempShield) to keep your drinks cold for up to 30 hours and hot for up to 13 hours. No more lukewarm water halfway through your day! It comes with THREE different straw lids for sipping convenience, and they're designed to be leak-resistant and splash-resistant - goodbye, wet gym bag! The straw is flexible and comfy to drink from. It's got a strong ergonomic handle for easy carrying, and the slim design fits in most car cup holders, which is a huge plus. The exterior has a 'no sweat' design to prevent condensation, so your hands stay dry. It has a sleek, simple matte black finish that goes with everything. Plus, it's compatible with other 'Large Press-In' accessories if you want to customize it later. It even has a removable fruit filter if you like to infuse your water. Easy to carry, open, drink, and close with the ONE cap system. A pure taste guarantee because stainless steel doesn't hold flavors. Perfect for the gym, hiking, work, or just daily hydration. Stay cool (or warm)!