I got these cups mailed, packaging was superior and ample so glasses didn’t break during transit. Upon opening I could tell that joy jolt made these with high quality glass. They look stunning, crystal clear. I put my hot morning coffee in and it didn’t burn my hand to hold the outside and I thought it was super cool to see what I was drinking. I love these. They are definitely my go to. I love joy jolts glasses! Superior craftsmanship and attention to detail go into all of their products!