Do these mugs have a completely flat bottom? Most mugs have an indented bottom so only the rim rests directly on the mug warmer.

It has a very shallow indent that goes from the center to about half way to the edge then is flat from there to the edge. I use it with a mug warmer and it keeps my coffee hot.

Are these made in USA ?

The bottom of the box clearly states that these are made in China. Perhaps the other person was confused as the box also states that they were designed in Chicago, IL. Personally, I found these way too thin to keep.

Are these microwave safe?

Thanks so much for your inquiry. Yes, the Science of Coffee Glasses 16 oz mugs are microwave safe. Please note, that like all glassware, the outside will be hot after microwaving when the glass is filled with liquid. Use the handle to hold the glass after microwaving.

Are these double wall mugs?

No but despite that they're pretty cool. I bought them like a month ago and so far so good.

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Bicycle Glasses

Product ID: 256345577

Details

Brand
Greenline
Capacity
16 ounces
Color
Clear
Material
Glass
Special Feature
Dishwasher

☕16 oz perfect capacity

🧪Detailed coffee molecule etching

🧼Dishwasher safe & lifetime guaranteed

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259 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Details

Brand
Greenline
Capacity
16 ounces
Color
Clear

Description

🧪 Elevate your coffee ritual with a mug that’s as smart as your brew!

GIFT READY ELEGANCE - Comes in an elegant box, perfect for impressing science lovers and coffee aficionados alike.
LASTING IMPRESSIONS - Sand-etched design that won’t fade or wash away, even after heavy use.
SIP SCIENCE IN STYLE - Etched with authentic coffee chemistry molecules for the curious mind.
DURABILITY MEETS DESIGN - Lead-free premium glass that's breakage resistant and dishwasher safe.
GENEROUS 16 OZ CAPACITY - Ideal size for your morning cappuccino, espresso, or java fix.

The Greenline Goods Glass Coffee Mug set features two 16 oz lead-free glass tumblers etched with detailed coffee molecule diagrams. Designed for science enthusiasts and coffee lovers, these durable, dishwasher-safe mugs combine educational artistry with premium quality, making them a unique and elegant gift choice.

Specifications

ASIN	B08F5K6MS2
Age Range Description	Adult
Best Sellers Rank	#266,951 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #7,876 in Novelty Coffee Mugs
Brand	Greenline Goods
Brand Name	Greenline Goods
Capacity	16 ounces
Color	Clear
Customer Package Type	Standard Packaging
Customer Reviews	4.6 out of 5 stars 511 Reviews
Included Components	Handle
Item Dimensions W x H	4"W x 4.5"H
Item Weight	1 Pounds
Manufacturer Part Number	TX-4GEU-1QWQ
Material	Glass
Material Features	Insulated
Material Type	Glass
Material Type Free	Lead Free
Model Number	TX-4GEU-1QWQ
Number of Items	1
Other Special Features of the Product	Dishwasher Safe
Pattern	Solid
Product Care Instructions	Hand Wash Only, Machine Wash
Product Style	Science of Coffee
Recommended Uses For Product	Home
Reusability	Reusable
Shape	Round
Size	16 Ounces
Special Feature	Dishwasher Safe
Style	Science of Coffee
Theme	Chemical,Chemistry,Science
UPC	650434718721
Unit Count	2.0 Count

Reviews

D**N

6.12.2025

I**N

11.08.2025

J**E

6.10.2023

K**S

8.05.2024

J**N

6.03.2022

G**E

23.12.2021

P**.

20.01.2021

T**I

27.09.2023

E**A

9.05.2021

L**A

7.07.2021

P**O

3.06.2022

C**R

18.08.2021

H**I

6.11.2021

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259 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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