The Yo Yo tea cup infuser from Bodum enables you to make freshly brewed tea from tea leaves directly in a mug. The perforated strainer ensures that leaves and kernels remain in the strainer. The lid has two purposes: if put upside-down onto the strainer, it keeps the water warm while the tea is brewing - if flipped after the brewing, it can be used as a saucer for the tea infuser. The hole on top of the tea infuser allows for easy storage by just hanging it up. The set comes with a tempered sodalime 0.35l/12fl.oz glass mug and is dishwasher safe. Additionally with a length of 11.7cm/4.6in, the infuser fits into all BODUM mugs.