Four flexible covers that sit over the top of a mug or cup. Press the center and the lid settles into place, holding a seal that keeps a drink at temperature while you finish an email, and keeps dust and splashes out in the meantime.
They are made of food-grade silicone, so they handle hot and cold alike and flex to fit a range of rim sizes rather than matching one mug. Each cover measures 10.20 x 10.20 x 0.20 cm (4.01 x 4.01 x 0.08 in) and lifts off with a fingertip.
