Caffeine Beaker Mug, Caffeine Molecule Mug - Chemistry Mug 16 oz Borosilicate Glass Coffee Mugs with Handle and Measuring for Coffee, Latte, Tea or Hot and Cold Beverage - Tea Coffee Mug

These (I bought 3) were gifts for lab assistants and they loved them. They were nice, large, and sturdy with clear markings and easy to heat and drink from. The price was very reasonable and this is a go-to gift for any chemistry colleagues or friends!

Nice borosilicate cup/mug and as expected very thin glass and almost weightless, but delicate and not for people with big fingers.Update: I used this cup 4 times and was very careful with it and I just noticed it was leaking out the bottom. Coffee kept showing up on the countertop and after transferring to another cup I turned the is cup over and sure enough a small crack. This is absurd! I will attempt to get a refund.

I wanted a mug that would hold a full 20oz. when filled to the brim, and this "16 oz. mug does exactly that. The other key thing for me is that I wanted a mug that would be my daily "desk mug" so I could make my morning latte and have it on my beverage warmer at my desk and sip it over the course of several hours. If you have a beverage/mug warmer, you know that the key to those working well is that the mug you use needs to be flat or nearly flat on the bottom. Most mugs are not flat - they have a "ring" or "rim" around them and thus aren't flat when placed on a warmer. This mug is exactly that. I bought mine exactly FOUR YEARS AGO and have used it every single workday since! At first I was very concerned at the thin glass. But it has lasted this entire time. I hand wash it - no dishwasher. I do use it in the microwave every day to heat up the milk for my latte, and I also use a milk frother wisk to blend in my protein powder. So this thing has held up perfectly, despite how thin the material is. For my purposes this has been absolutely perfect! If I am looking for a mug to sit with on the couch or take out on the porch with me that will keep the beverage hot for a long time, this is not the mug I use for that. But at the desk and on a beverage warmer it is absolutely perfect. And the handle is also a very nice size and VERY sturdy.

So cute and good quality. We perched this for my kids science teacher for teacher appreciation week and they really liked it.

I have worked for decades in labs where borosilicate glassware is used for many purposes. Heat resistant and generally tough, it survives the scuffs and bumps of lab use amazingly well.The point of this mug is to simulate that -- but with a handle added, and with the molecular diagram of a caffeine molecule added for humor. As a joke this is a bit edgy, because one of the most important rules of lab safety is to NEVER drink or eat from lab glassware.While this mug appears (from a little distance) to be just like "the real thing" (a Pyrex or Kymax beaker with a handle added and a funny molecular diagram of caffeine) it does not have the durable and tough feel of real labware that I had hoped-for.I like it, and I will use it -- but I bought it thinking I'd get something a bit more "real."

very cute and is dishwasher safe!the glass is on the thin side but i have had no issues

Cool looking cups but the glass is like a wine glass. It is very thin and I am afraid to use it as a coffee mug. Im almost sure it will break within the first few days.

Perfect for a Chemical Engineering grad.