Greenline GoodsGlass Coffee Mug - 16 oz Tumbler Science of Coffee Glass (Set of 2) - Etched with Coffee Chemistry Molecules

The design is perfect for us science lovers. It's glass, so treat it with appropriate caution regarding hot liquids and handling with care to avoid breaking! Holds a wonderfully large amount of coffee for those difficult wake up days.

The Glass is Very Nice, rounded and smooth. We wondered if it was like lab glass and could be heated with a Bunsen burner? Not sure on That! Very Nice Coffee Mugs!

A microwaveable mug I can use without the handle searing the skin off my fingers! I like the larger handle that arches away from the mug body and also appreciate the thinner glass; my beverage stays at a higher temp while sitting on the mug warmer (vobaga model vob 10 on the high setting gets very hot!). In fact, as the volume in the cup goes down, I must turn down the temp on the mug warmer (I know…duh!) Greenline is serious about the packaging for these mugs! This set of two mugs arrived in perfect condition securely nested in what appears to be custom molded foam and in a lovely ready-to-gift-wrap box (I know nothing about the magic of commercial packaging). I enjoy the sand etched designs; won’t wash off…yay, I get to enjoy the caffeine molecule designs for the life of the mug! This is all good news for me and I will add to the collection from Greenline Goods!

I absolutely love this set. Yea they're a little on the light/thin side but I dont manhandle my coffee mugs so I'm not too worried. Overall craftsmanship is fantastic. I love the description of each chemical as well.

Very cute! Surprisingly lightweight but didn’t feel super fragile. My friend loved them.

Nice glasses however some details on the etching are absent, faded or illegible. Other than that, cool concept

This is a beautiful set of mugs and for that, they get 5 stars. They work well for my coffee and reheat drinks in the microwave without getting overly hot. The one improvement I would recommend is thicker glass, say 1.5 to 2x thicker. It is interesting for some of the chemical formulas they explicitly show the H's and for others they do not (both are acceptable, just interesting that it would vary). I have not checked all the structures, but the four I checked were all correct. I had to consult a food science article for one of them!UPDATE: I've been using these for 2 months now and they are absolutely my favorite. They seem to be reasonably tough and I don't have concerns about the glass thickness. Highly recommend

I've been searching for new glass coffee cups, and these were the first ones I found that called themselves durable. I LOVE these coffee cups!! They're lightweight, beautifully designed and perfect for my morning coffee.I highly recommend these beautiful cups to EVERYONE!!