Choose the red coloured bottle 25oz to get the £6.73 price. There are 19 other colours to choose from and they are around £13, but the red one is the only one with the low price. I think the reason it is cheap is because Amazon have used the wrong photo just for this colour option. The page is showing the bog-standard podium smaller-sized and uninsulated bottle for this red version and that has probably put buyers off. Anyway I ordered it and received a "Podium Big Chill Bottle 25oz Red". (25oz US roughly equals 750ml).