Zojirushi Black Mug Bottle Stopper Set 6x6x3.5cm Model Sm-S10N-Ba

"Unleash advanced insulation with the Zojirushi Black Mug Bottle Stopper Set, Model Sm-S10N-Ba. Sized at 6x6x3.5cm, it guarantees maintained temperatures for your drinks, whether hot or cold. Ideal for travelers, professionals, or home use, it combines style and efficiency in a compact design."