["Its an innovative style with a sturdy thick glass and heart-shaped design that blends durability and creativity and I look forward to seeing you use them to make a wide variety of cocktails." The inside of the mug is a heart-shaped design if you are looking for a special shot glass I recommend them I am sure they will be the focus on the party it will be a fun talk between you and your friends . "Thick glass effectively insulates heat and using them for espresso is also a great suggestion and theyll definitely be a great addition to your collection." "Theyre very sturdy and have no problem with washing them in the dishwasher ." Valeways will offer a free replacement or refund if anything goes wrong with the product.]