Miu Color via Amazon offers Prime members the Miu Color 550ml Borosilicate Glass Water Bottle with Nylon Sleeve in Black for $15.99. Coupon code "BU7AQ2FD" makes it $14.39. With free shipping, that's $15 off list and the lowest total price we could find. (Non-members can spend over $35 for free shipping; otherwise, shipping adds $5.63.) It's crafted of heat-resistant glass and includes a stainless steel cap.