Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Do these have laser etching inside the glass on the bottom?
Document: to everything, there is a good possibility that beer will be lost.It is not a design flaw, good glasses are thin. The base is heavy where the ripples meet the bowl and the bottom of the glass has a small laser-etched circle on the inside about the size of a pencil eraser. (Another review had commented that there was not a logo etched on the bottle for nucleation.) The Spiegelau logo is etched on the outside bottom of the glass.
This is a great glass with amazing quality. It looks good and really does add to the IPA experience. However, when I read the other online reviews about the glass, the laser etching for the sustained carbonation and head was one of the main features that I was looking forward to testing out. There was a big disappointment when I took the glasses out of the box and did not see anything in the bottom of the glass, I was hoping for some sort of Spiegelau logo.
The IPA glass designed by Spiegelau for Dogfish Head and Sierra Nevada has etching on the bottom inside which enhances and encourages carbonation. These Spigelau glasses from Amazon do NOT have any etching inside, and a side-by-side comparison of this glass with my Dogfish Head glass demonstrates this difference in carbonation. The Sierra Nevada glasses are now available at good retail markets so save your money and get one of those. BTW, this new glass design definely enhances the beer experience.
DF has their glass available with the laser etching on their own website for purchase, I wish I would of tried not to get out of shipping charges and purchased direct from the brewery. Still an overall quality glass and great addition to my collection.
you can tell these glasses are meant for IPA's. Tiny etching on bottom keeps the allows the carbonation to collect and release up towards the tulip shaped top. Great deal wish I would have bought 4 more. The only complaint is the this glass is easy to break. I have found that out on many of my Spiegelau glasses.
I've been jealous of all the folks who've been using the SN/DFH glass for their IPAs and I finally picked these up myself when I saw the good price on amazon. I'm pretty impressed by the glass. Feels nice in your hand and you can really feel the quality.However, these glasses here appear to have everything listed below EXCEPT the laser-etched logo at the bottom of the bowl.
* A slender, bowed shape to amplify hop aromas. * Wave-like ridges to aerate beer on its way in and out of the glass. * A wide mouth, allowing drinkers to comfortably nose the beer. * A laser-etched logo on the bottom of the bowl to sustain carbonation and head.Also, my buddy was able to find the IPA glass locally for a lot cheaper, although I cannot speak to the quality.
Deeper flavors that I had never experienced from this beer come flourishing out, especially when you get to the bottom of the glass. Overall, this glass does all it is advertised to do, and I don't think I'll ever be using a regular tumbler again for my IPAs at home.
This is a tough one to review. On the one hand, it does do what it claims: it's a great shape for an IPA. The tulip at the top allows you to get a nice whiff of the IPA aroma while sipping the beer, while the thick glass &#34;handle&#34; at the bottom lets you hold it without warming the beer up too much.
Someone only familiar with pint glasses may want to take extra care when purchasing these glasses. The trick is to never wash these glasses until the day after. Sober hands are less clumsy.Lastly, the bottom of this glass is a pain to clean. I found loosely wrapping a wash cloth around a spatula handle works well.
Answer: I'm assuming you are referring to wether the bottom of the glass contains nucleation points, the answer is yes.  These nucleation points were laser'd in to help release CO2 and enhance aroma and flavor.  Cheers