Normal uninsulated bottle with ice lasts me 45 minutes in 90 to 100 F ambient temperatures. Half ice and drink in Polar lasts about 2 hours cold and gets to warm for my taste by hour 3 under the same conditions. I bought two of the smaller bottles when they first came out. The bottles logos’ were coming off on my hands during rides. Called Polar company and told them they might have a QA problem with the logo printing process. This did not affect the bottles ability to provide a cold drink. Polar sent my two new bottles. Nice company.