"KeepCup LongPlay adds a removable tritan booster to our glass cup to create a twin-walled vessel. The booster increases durability and protects touch.
For hot drinks, LongPlay will improve heat retention and insulate your hand from heat, and for ice drinks, LongPlay will keep them cold longer and prevent condensation.
LongPlay Harvest comes with an ocean band (Pantone 3145c), kingfisher lid (Pantone 7707c), cryptonite plug (Pantone 3405c) and a tritan booster."