The Prune Danish via Amazon offers Prime members the Rubbermaid 20-oz. Filtration Bottle
in Blue, model no. 1783826, or Purple, model no. 1783830, for $4.99
with free shipping
. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.25.) That's the lowest total price we could find by $13. It features a replaceable filter and chug spout with protective cap.