eBay has the Rosewill Personal Vacuum Blender for $19.99.
Remove air while maintaining nutrients. The easy-to-use vacuum attachment allows you to reduce oxidation, preserve taste and create a more fresh, delicious drink. Don't settle for conventional methods. Try the vacuum way which will pump up -60 kPa within the first minute. Trigger up to 300 watts of quiet blending power to prep up your healthy and nutritious drinks at any time of the day, with the single push of a button. The clean and elegant 20 ounce BPA-free bottle is impact-resistant and dishwasher safe to preserve and re-use many times over. The bottle's distinct hook and resealable lids make it convenient to take on your way to work, the gym, outdoors and even while staying indoors. Easy storage and secure to avoid spills while on the go. Equipped with 4 stainless steel blades, coming in under 3.5 pounds and up to 18 inches tall, this convenient and portable blender allows you to make great smoothies, shakes, juice, baby formula, marinades, salad dressings and much more.