The Elite Ice Fly Thermal Bottle 500ml is Intended as a racing or sportive bottle for use in hot, conditions where keeping cool and hydrated is a constant challenge, the ice fly is a new concept in thermal bottlesElite Ice Fly Thermal Bottle 500ml Featureswhere as more our leisure orientated bottles such as our nanogelite range prioritise thermal performance, the ice fly is designed to offer a balance of thermal insulation with a race-friendly low weight and thinner, easy-to-squeeze walls allowing rapid delivery of fluidsthe ice fly's lightweight insulation is designed to be effective for up to 2 hours in keeping liquids cool and refreshing, if you need longer then check out the ombra nanogelite models which offer a class-leading 4 hoursof course, carrying the fly name this bottle has many of the features you'd expect from the bidon that dominates the Pro pelotonthe fly was born directly out of years of feedback from the world's fastest riders and the desire to create the ultimate lightweight racing bidonwall thickness has been pared down to the absolute minimum whilst maintaining integritystripped down, 2-piece cap is light and super-fast to remove with the opening designed to easily take powder scoopssimplified, 1-piece valve can be removed for cleaning but still delivers fluids fastweight: 131 grams100% bpa free