What Does An 11oz Mug Weigh

When catalogues list an 11oz mug, they are not talking about the weight of the mug. They are talking about the amount of liquid that the mug will hold. They mean that an 11oz mug holds 11oz of liquid, which is equivalent to 312 ml or just under a third of a litre of liquid.

We wanted to know how much the mugs themselves weigh without liquid in them. We wanted to know because we were looking at companies that would print our designs on their mugs. The thing is that companies that print designs on mugs don’t usually manufacture the mugs themselves. They just print designs on them to their customers requirements.

And that matters because lifting a heavy mug full of liquid to one’s lips just isn’t as nice as lifting a light weight mug. We know that’s true because people pay more money for lighter weight mugs.

Why Some Mugs Are Heavier

The weight of a mug depends on what kind of clay it is made of. Cheaper clays can’t be heated in a kiln to the high temperatures better quality clays are heated – so the process is cheaper. But cheaper clays are not as strong, so the mugs have to be thicker – and therefore heavier.

Earthenware is the cheapest, and beyond that is stoneware. Stoneware is fired at a higher temperature, where it vitrifies or turns to a glasslike material that is impervious to water even without a glazing coat. Beyond stoneware, porcelain is a mix of fine kaolin or China clay and minerals such as feldspar and quartz.

Higher in quality even than porcelain is bone china, which is a mixture of clay, minerals such as feldspar and quartz, and about one third bone ash. It’s funny to think of people drinking from fine bone china cups when you know that the cups are made from burnt bones.

Which Company Uses The Lightest 11oz Mug

The weight of an empty mug varies a lot from one printing company to another. If you are looking online you will find that suppliers usually don’t state the weight of the mugs. They may not even know. They may have never thought about weighing the mugs. I know that is true for some suppliers. They buy from a manufacturer and they are buying to a price.

For made-to-order mugs, none of the companies use really lightweight clay. The last time I enquired, these were the weights of the mug for an 11oz mug.
Giftflow: 327g
Printful: 354g
CustomCat: 450g
Gelato: 346g

If we had been prepared to order hundreds of each design then there are suppliers who use porcelain or bone china for lighter weight mugs – anywhere from 215g to 275g. But then the initial outlay is bigger because you have to buy hundreds of each design, whereas with made-to-order, the mug is printed when our customer has paid.

For a single made-to-order mug, the sums don’t add up (cost versus selling price) unless we accept that the mug is going to be heavier – like the ones from the companies I’ve mentioned.

In the great scheme of things, the weight of a mug is comparatively unimportant. But a light weight mug is a pleasure to lift to one’s lips. And a heavy mug just isn’t as nice.

Do Your Own Research

This is a reminder to check with the suppliers yourself. Do your own research. These numbers may be out of date, or there may be a new kid on the block.

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