Cooplay via Amazon offers the Kuwan 8.5-oz. Double Wall Insulated Borosilicate Thermo Glass Cup with Heart Shaped Spoon, model no. J-KW-456, for $13.99. Coupon code "J6NZNYTT" cuts it to $6.99. Plus, Prime members grab free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.40.) That's $10 off list and the lowest total price we could find. It's heat resistant and microwave-, dishwasher-, and oven-safe.