Life is good Stack-Happy Mugs (2-Pack) for $4.73. Select in-store pickup at REI to save on shipping. Otherwise shipping is free on orders over $50. If needed, use this Filler Tool to qualify for free shipping. Here is a screenshot for reference. The mug is tapered at the bottom to be stackable, dishwasher and microwave safe, and has a 14-ounce capacity.