Jumbo Mugs, 23 oz, Set of 2, Prussian Blue
Glazed stoneware in prussian blue, fired hard enough to shrug off a daily wash.
Holds 23 oz to the brim, comes as a set of 2, made for tea, coffee, soup.
Capacity: 23 oz
In the range · Mug Sets
Piece information
- Capacity23 oz
- In the box2 pieces
- ColourPrussian Blue
- BodyGlazed stoneware
- HandleHandle
- DishwasherSafe
- MicrowaveSafe
- Glaze materialsLead-free, cadmium-free
- Height3.5 in
- Width6.7 in
- ReferenceBM-7PO3
Everything above is stated for this piece. Where a figure is not stated, the row is not here rather than filled with an average.
What the glaze does
This glaze is mixed to sit still in the heat, so the finish is even across the piece and from one piece to the next.
Care
- Rinse a cold piece in warm water before filling it with something boiling.
- Put a cloth between pieces when you stack them. Glaze is glass, and glass scratches glass.
- Skip the scouring pad. A cloth and warm water take off everything a mug picks up.
When stacking glass or ceramic items for storage, place a cushion of soft material between each piece.
the Canadian Conservation Institute
Read 14 August 2026. More on the care and safety page.
More Bosmarlin mug sets
What you are holding
The same eight things are true of every piece we make.
Fired hard
Stoneware is fired dense, so it holds heat and shrugs off the knock against a tap.
Glaze that moves
Mineral oxides travel in the heat, so the line between colours is drawn by the firing.
Handles for full mugs
A large mug carries a handle you can put a whole hand through.
Made to stack
Wide feet and even rims, so a shelf of them sits flat.
Dishwasher and microwave
Stated on nearly every piece in the range, and true of the glaze rather than a hope.
No two alike
Speckles land differently and a fade can sit higher or lower on the next piece.
Lead-free and cadmium-free
As stated on the range. What that means is set out on the care page.
Sized for real drinks
From 8.5 oz for a cappuccino to 50 oz for a mug of soup.
Stoneware, porcelain and earthenware
Three words used loosely on the same shelf. They describe how hot the clay was fired and how much water it will still absorb, and that difference decides how a piece behaves in a dishwasher, in a microwave and against the edge of a sink.
Stoneware, what we make
- Fired hot and dense, so it absorbs almost no water
- Heavy in the hand and stable on a desk
- Chips are rare, and a chip does not soak up coffee
- Holds heat noticeably longer than a thin cup
Porcelain
- Fired hot too, but thrown thin and light
- Elegant, and far easier to chip on a tap
- Cools faster because there is less body to hold heat
- Usually sold as a full service rather than by the piece
Earthenware
- Fired lower, so the body stays porous
- Depends entirely on its glaze to hold liquid
- A crazed or chipped glaze lets the body absorb
- Lighter and cheaper, and shorter lived in daily use
The three words describe firing temperature and how much water the fired body still takes up. Everything else follows from that.