When it comes to temperature retention, Tri-Ply Vacuum Technology in stainless steel water bottles leads the industry. This advanced insulation technology includes an additional aluminum layer between two stainless steel walls, enhancing thermal performance. Thermosteel bottles and insulated bottles using this technology keep your drinks hot for up to 12 hours and cold for up to 24 hours. Whether you’re taking a morning coffee to work or carrying a cold drink on a hike, a Tri-Ply insulated bottle ensures you’ll have the perfect sip whenever you want it. Plus, Tri-Ply technology reduces condensation, keeping the bottle’s exterior dry and comfortable to hold.