CooPlay via Amazon offers Prime members the Kuwan 8.5-oz. Double Wall Insulated Glass Cup for $10.99. Coupon code "XJPPGGH5" cuts it to $7.03. With free shipping, that's $4 under last week's mention, $4 off list, and the lowest price we could find. It's microwave-, dishwasher-, and oven-safe, and includes a spoon. Deal ends July 6.