These are GENUINE Tervis Tumblers. As the original and oldest insulated tumbler brand in the USA, Tervis is well known nationwide. Features: Bullet proof strength made from high grade polycarbonate makes the tumbler virtually indestructible Crystal clear as glass Double-wall insulation keeps hot drinks hot and cold drinks cold No sweating - reduces need for coasters Freezer and dishwasher safe Lifetime unconditional guarantee. Brand new in mint condition and in original packaging.