400ml (13.5oz) Diner Mug - Oat
This classic diner mug removes 2,000 plastic straws from the ocean
Dishwasher Safe Porcelain
Dishwasher Safe Porcelain
Our kiln-fired porcelain gives the Classic Diner Mug a durable, premium finish that’s designed for easy everyday cleaning in the dishwasher
Product Info
A classic diner mug for everyday coffee
The Just Bottle 400ml Classic Diner Mug is a premium porcelain coffee mug inspired by the weight, shape, and nostalgic feel of a traditional American diner mug. Designed for generous coffees, morning brews, and everyday café style moments at home, it combines a timeless retro diner mug shape with a smooth glazed finish that feels refined in hand.
Made from premium kiln-fired porcelain, this 400ml coffee mug has a comfortable handle, a sturdy feel, and a clean interior finish that helps preserve the taste of your coffee. The soft Oat colour gives it a warm, understated look, making it an easy cream diner mug for daily use, kitchen shelves, or gifting.
Its generous 400ml capacity is ideal for filter coffee, flat whites, lattes, tea, and longer hot drinks, while the durable porcelain construction makes it suitable for everyday use.
Product details:
- Classic diner coffee mug
- Made from high-quality kiln-fired porcelain
- Inspired by traditional American diner mugs
- Capacity: 400ml (13.5oz)
- Smooth, durable glazed finish
- Comfortable handle for everyday use
- Weighted feel with a timeless retro diner shape
- Soft Oat / cream finish
- Ideal for coffee, tea, lattes, and longer hot drinks
- Dishwasher safe
Before first use
As with all high-quality drinkware, wash the mug with warm soapy water before first use. Every porcelain mug is hand made and naturally unique, with subtle variations in glaze and finish that add to its character.
Shipping
Shipping You Can Count On
We deliver worldwide, no matter where you are, we’ll get your product to you. Every order is securely packed and shipped with trusted carriers, with tracking included for peace of mind. Free shipping is available in many countries once you reach the minimum spend - you’ll see the minimum spend when you add to cart. Wherever you call home, we’re proud to deliver sustainably and reliably
Warrany - Made to Last™
Made to Last™ Promise
At Just Bottle, quality isn't optional, it's our standard. That’s why every product is backed by our Made to Last™ Promise.
What’s covered: We guarantee your product is free from manufacturing defects - including issues with the materials, functionality, or insulation performance for the lifetime of the product.
What’s not covered: Normal wear and tear (like dents from drops, or scratches) and damage from misuse or accidents.
If something’s not right, we’ll make it right - no complicated process, no fine print
A classic diner mug for everyday coffee
The Just Bottle 400ml Classic Diner Mug is a premium porcelain coffee mug inspired by the weight, shape, and nostalgic feel of a traditional American diner mug. Designed for generous coffees, morning brews, and everyday café style moments at home, it combines a timeless retro diner mug shape with a smooth glazed finish that feels refined in hand.
Made from premium kiln-fired porcelain, this 400ml coffee mug has a comfortable handle, a sturdy feel, and a clean interior finish that helps preserve the taste of your coffee. The soft Oat colour gives it a warm, understated look, making it an easy cream diner mug for daily use, kitchen shelves, or gifting.
Its generous 400ml capacity is ideal for filter coffee, flat whites, lattes, tea, and longer hot drinks, while the durable porcelain construction makes it suitable for everyday use.
Product details:
- Classic diner coffee mug
- Made from high-quality kiln-fired porcelain
- Inspired by traditional American diner mugs
- Capacity: 400ml (13.5oz)
- Smooth, durable glazed finish
- Comfortable handle for everyday use
- Weighted feel with a timeless retro diner shape
- Soft Oat / cream finish
- Ideal for coffee, tea, lattes, and longer hot drinks
- Dishwasher safe
Before first use
As with all high-quality drinkware, wash the mug with warm soapy water before first use. Every porcelain mug is hand made and naturally unique, with subtle variations in glaze and finish that add to its character.
Shipping You Can Count On
We deliver worldwide, no matter where you are, we’ll get your product to you. Every order is securely packed and shipped with trusted carriers, with tracking included for peace of mind. Free shipping is available in many countries once you reach the minimum spend - you’ll see the minimum spend when you add to cart. Wherever you call home, we’re proud to deliver sustainably and reliably
Made to Last™ Promise
At Just Bottle, quality isn't optional, it's our standard. That’s why every product is backed by our Made to Last™ Promise.
What’s covered: We guarantee your product is free from manufacturing defects - including issues with the materials, functionality, or insulation performance for the lifetime of the product.
What’s not covered: Normal wear and tear (like dents from drops, or scratches) and damage from misuse or accidents.
If something’s not right, we’ll make it right - no complicated process, no fine print
Buy 1, Remove 2,000
With every classic diner mug, we remove 1 kilo of plastic waste, equal to 2,000 plastic straws, directly from beaches and coastal waters.
Instead of focusing on prevention, we support hands-on cleanup efforts where plastic has already entered the environment, making a real, measurable difference for our oceans
3,647,620
Plastic straws removed from the ocean recently
100%
Traceable through our partner organisations
Designed with the sturdy, satisfying feel of a traditional American diner mug, this 400ml porcelain coffee mug has a reassuring weight in hand without feeling oversized. The curved shape and comfortable handle make it easy to enjoy longer coffees, teas, and everyday hot drinks.
Crafted from high-quality kiln-fired porcelain, the Classic Diner Mug has a smooth glazed finish that feels refined while staying practical for daily use. The clean interior helps preserve the taste of your drink, while the soft Oat colour gives the mug a warm, timeless look
With a generous 400ml capacity, this diner coffee mug is ideal for filter coffee, lattes, flat whites, tea, and slow morning brews. Durable, food safe, and dishwasher safe, it brings a premium café-style feel to an everyday essential
Designed with the sturdy, satisfying feel of a traditional American diner mug, this 400ml porcelain coffee mug has a reassuring weight in hand without feeling oversized. The curved shape and comfortable handle make it easy to enjoy longer coffees, teas, and everyday hot drinks.
Crafted from high-quality kiln-fired porcelain, the Classic Diner Mug has a smooth glazed finish that feels refined while staying practical for daily use. The clean interior helps preserve the taste of your drink, while the soft Oat colour gives the mug a warm, timeless look
With a generous 400ml capacity, this diner coffee mug is ideal for filter coffee, lattes, flat whites, tea, and slow morning brews. Durable, food safe, and dishwasher safe, it brings a premium café-style feel to an everyday essential
Buying for Business?
If you’re looking to add your logo to reusable drinkware for your business, we offer a dedicated range designed specifically for corporate branding and bulk orders.
This includes custom porcelain mugs, along with an extended collection of bottles, stainless steel mugs, and tumblers created for high-quality logo printing - ideal for events, team gear, and corporate gifting
View Corporate Branding CollectionFAQs
Is the Classic Diner Mug dishwasher safe?
Yes, the 400ml Classic Diner Mug is dishwasher safe, making it easy to clean after everyday use. The smooth glazed porcelain finish is designed to be practical for daily coffee, tea, and longer hot drinks
What size drink does the mug hold?
The mug has a generous 400ml / 13.5oz capacity, making it ideal for filter coffee, lattes, flat whites, tea, hot chocolate, and larger morning drinks. It has the feel of a classic diner coffee mug, with enough space for a proper everyday brew
Is porcelain durable enough for daily use?
Yes, the mug is made from high-quality kiln-fired porcelain with a durable glazed finish. It is designed for everyday use, but like all ceramic and porcelain drinkware, it should be handled with care to avoid chips or breakage if dropped
What makes this mug more sustainable?
The Classic Diner Mug is reusable, long lasting, and designed as an alternative to disposable takeaway cups or low quality mugs that need replacing often. As with every Just Bottle product, each mug also helps fund the collection of ocean-bound plastic through our impact partners
Will every mug look exactly the same?
Each porcelain mug is hand made and naturally unique, so there may be subtle variations in glaze, finish, or tone. These small differences are part of the character of high-quality porcelain and give each mug a more premium, individual feel
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