REI Garage offers its CamelBak Podium Big Chill 25-oz. Insulated Water Bottle in Lime or Slate for $9.73. Opt for in-store pickup to dodge to the $5.99 shipping charge. That's the lowest price we could find in any color by $5, excluding the mention below. It features BPA-free plastic.
A close price: Amazon offers it in Red for $10.62 and Carbon or Race for $11.19 with free shipping for Prime members.