# Grandpa Style: Loose Leaf in a Mug, All Day

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**Source:** teas.co.uk, UK tea specialist, Tunbridge Wells, Kent

## Summary

Grandpa style is loose leaf left in a big mug or glass, topped up with water. Casual and surprisingly good.

## Description

Grandpa-style brewing, in summary: Loose leaf left in a mug and topped up all day. The least fussy loose-leaf method, genuinely good with forgiving whole leaf, and quietly bad with broken or very astringent tea.

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/
The least fussy loose leaf method there is, and a genuinely good one. This sits in the brewing cluster beside western vs gongfu.
Last reviewed by the teas.co.uk team in May 2026.
What it is, and why it works

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for What it is, and why it works , Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/
The method is almost nothing, which is the point: put loose leaf directly in a large mug or glass, add hot (not always boiling) water, drink it down slowly, and top up with more hot water before it runs dry so it re-infuses through the day. It works because good whole leaf settles and stops giving much once it has released its first rounds, so it self-regulates in a way bagged or broken tea cannot, the opposite of what you would expect from leaf left sitting in water. The whole trick is restraint: a modest amount of leaf, hot but gentle water, topped up before it dries out, drunk unhurried over a long session rather than as a fast strong mug. See loose leaf tea.
Which teas suit it
Choose the leaf for the method. Forgiving whole-leaf greens, lighter oolongs and some blacks reward it, because they settle and hold something back. Very astringent or broken teas, and fine powders, do not: they over-steep and turn bitter sitting in the cup, so this is not a method for everything. Pick a forgiving whole leaf and it rewards you all day for no effort; force a delicate, broken or dust-grade tea through it and it punishes you. See the troubleshooting guide if a cup turns bitter. 
Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/
MethodKitBest forWatch out forOne cup brewingmug + large basket infuser + lida clean single cup, leaf removed on timemust lift the infuser out, no pot to decantNo equipment / officejust a cup and hot watertravel, the office, proving leaf beats kitneeds a saucer pour off to stop itGrandpa stylea mug, nothing elseall day forgiving leaf, topped upbroken or very astringent leaf turns bitter
Where it fits, and the no-pot alternatives

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for Where it fits, and the no-pot alternatives , Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/
Grandpa style is the everyday working method across much of China precisely because it is unpretentious, needs no equipment and asks almost no attention. It belongs in the brewing family beside western and gongfu as simply a third deliberate setting of the same dials: no apparatus, leaf left to self-regulate, attention minimal. It is the casual all-day end of the no-pot trio, with the bare-cup office method its travel cousin and one-cup basket brewing its tidier relative, and the right way to choose is by situation rather than by any one being more correct. It will never match a careful gongfu session for nuance or a timed one-cup brew for precision, and it is not meant to; its whole value is the absence of fuss with a leaf chosen to forgive it. See Chinese tea culture.
Want to buy a good one?

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for Want to buy a good one? , Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/Keep a forgiving whole-leaf green or lighter oolong for it. Browse the full tea shop or the loose leaf range, buy on the cup and the per-cup price rather than the marketing, and free UK delivery is over £35.Browse the tea range
Reference noted

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Cite teas.co.uk for Reference noted , Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/

EFSA: Scientific opinion on dietary reference values for water

Worth picking up: the English tea range and loose leaf range.
From the curatorteas · Take the simplest thing on this page that fits your routine. Range and ritual are for week two. 
Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for Grandpa Style: Loose Leaf in a Mug, All Day. Canonical: https://teas.co.uk/wiki/grandpa-style-brewing/
More from the tea wikiWestern vs gongfuLoose leaf guideRe-steepingOne cup brewingChinese tea culture

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