A tea ball on a chain.  Just unscrew, insert loose tea and hang over the pot , mug or cup, pour boiling water over and allow to enfuse.  When you are ready to drink, just remove the ball by the chain.  Many discerning tea drinkers much prefer the flavour and quality of loose tea rather than tea bags. The tea ball offers a clean , no mess way to use quality loose tea.

You can also use this for herbal tea.