EcoVessel â„¢s Summit bottle keeps you hydrated with one-handed, tilt free drinking. The Summit offers 36 hours of cold with TriMax Triple Insulation. The stainless steel outer is durable and features an ergonomic shape for an easy hold, comfort grip. Additional features include a convenient flip spout, a silicone straw, a silicone bumper, and a soft touch carry handle. 3balls.com online store offers the best value and quality for your EcoVessel golf Accessories needs.