Why is the only measure of how much this holds in milliliters instead of good old American ounces?

It is a scientific mug so of course it will be in ML. If you use your good ole brain and figure there is aprox 30ml in 1 fluid US OZ. The top line shows 400ml so it would be 13.33oz.

The mug is made in China. @JavaFennell, it's unfortunate that you didn't get the service you deserved. I can assure you that the mugs at Benz Microscope have the caffeine symbol screened on one side, and that customer satisfaction is our top priority.

Is this dishwasher safe?

It is a glass mug. I don't think it specifically says "dishwasher safe". My husband has it on his desk at work, so we've never tried it in the dishwasher. He loves it and it is a great conversation piece!

Is it possible to add customized symbols/words on the mug?

Yes. You can definitely have it engraved!

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Scientific Glass Caffeine Beaker Mug (450mL)

Product ID: 2872417

Details

Brand
Educational
Capacity
400 ml
Color
Transparent
Item Weight
7.84 ounces
Material
Glass

☕Caffeine molecule enamel reveals with dark liquids

🔥Heat-resistant for hot beverages

🧪400mL borosilicate glass beaker

$61.46

Duties & taxes included

In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧬 Sip smart, work smarter with the caffeine beaker mug!

SCIENCE MEETS STYLE - Show off your inner scientist with a sleek caffeine molecule design that only reveals itself with your favorite dark brew.
CONVERSATION STARTER - A unique mug that sparks curiosity and connects you with fellow caffeine aficionados in any professional setting.
GENEROUS 400 M L CAPACITY - Enough volume to fuel your productivity without constant refills—because time is money.
DURABLE BOROSILICATE GLASS - Crafted from lab-grade, heat-resistant glass that withstands your morning hustle without cracking under pressure.
PERFECT GIFT FOR MILLENNIAL MANAGERS - Blend your love for science and coffee culture into a stylish desk essential that screams ‘I mean business.’

This 400mL Scientific Glass Caffeine Beaker Mug features a heat-resistant borosilicate glass construction and an enameled caffeine molecule design that becomes vividly visible when filled with coffee or dark soda. Ideal for professionals who appreciate a blend of science and style, it offers durability and a generous capacity to keep you energized throughout your workday.

Specifications

ASIN	B009P8C600
Best Sellers Rank	#292,069 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #6,597 in Novelty Coffee Mugs
Brand Name	Educational Innovations
Capacity	400 ml
Color	Transparent
Customer Reviews	4.7 4.7 out of 5 stars (2,224)
Item Weight	7.84 ounces
Manufacturer	Educational Innovations
Manufacturer Part Number	5717-06C
Material Type	Glass
Model Number	5717-06C
Number of Items	1
Number of Packs	1
Size	1 Count (Pack of 1)
UPC	674788549282 850021010102
Unit Count	1 Count

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