Keep beverages ice cold during long, hot bike rides or hikes with this insulated bottle. Double wall construction provides an insulating thermal layer while a foil layer within the walls reflects solar heat away. Just fill it up with water and ice and hit the trail or road. Drip and spill free valve is cleanable, too- just twist and pull the valve out for easy cleaning. Also features a wide, 2 inch diameter opening for easy filling, knurled bottom and ridged top for good anti-slip grip. Fits into standard cycle bottle cages.