Which is why coffee plungers are good for coffee and not for tea leaves. Also the plunger damages the tea leaf and causes tannins to be released which can make the tea bitter.
Because infused tea sinks to the bottom of the pot, look for a pot with the spout at the top of the pot not at the bottom, to minimise the flow of leaves into the cup when pouring.
A well designed pot will have a spout that does not drip and a lid that stays in place when pouring the tea.
Many pots have infusers built in that prevent tea leaves from flowing into the cup and also prevent the tea from ‘stewing’.
Stewing happens when the tea in the pot is infused for longer than the recommended time. This distorts the flavour and makes the tea dull and bitter.