what's the best glass?

Well, the first link didn't work, but it is a Glencairn whisky tasting glass, or something of the same shape

Glencairn tasting glass. They're also called nosing glasses. Search Amazon... You can pick up 2 for like 12 bux.

I enjoy sipping into Ikea's Ivrig glasses (http://www.ikea.com/fr/fr/catalog/products/50258323/ ) I know it might sound heretic, but their shape just perfectly fits my hand, I can warm it up quickly and easily, aroma's are well concentrated to the nose ... I love them.

Smaller is better, tapered is helpful, heavier glass for durability. I like a V shaped glass as I feel that some spirits benefit too much from a cognac type glass and smell better than they taste due to it. I also prefer a heavier glass that doesn't break so easily as I have better things to tend to that a glass collection. A small sherry or cordial glass works well for tasting. If I'm going to drink, I do pour a cognac style glass. http://www.amazon.com/Snaps-Cordial-Schnapps-Glass-Svalka/dp/B00KGF9M44/ref=sr_1_3?ie=UTF8&qid=1425321442&sr=8-3&keywords=cordial+glass

I've got the Glencairn, which I always used to use, but have moved on to something similar to the Ivrig glass. I think (and being equally heretical, but they are designed to be reused) the glass I use now might be an old Amora mustard/mayonnaise glass (http://www.europafoodxb.com/media/cache/b3/b0/b3b09f647e83ea14113b5d865c157467.jpg). As I say, my nose fits completely in the glass so I can inhale and swallow at the same time. The Glencairn might be good for nosing, but you can't nose and drink at the same time, and I like the attack on both senses at the same time (smell & taste). Funny that Skipjack mentions a heavy glass. There was research into Gin & Tonic not so long ago, which came to the conclusion that it tasted better out of a heavy glass. This was the mind playing tricks.

Glencairn. purpose built, affordable and effective. Does it need anything else?

I've been happy with the Glencairn as well. I'ts a good cheap glass. However, I recently came across https://shopriedel.com/vinum-xl-aquavit-spirits-glass.html I bought 4 glasses because it was on sale at the local shop. I'ts a stemmed glass, lies perfect in the hand and with a great balance. The shape really brings out the nose of the rum. It was originally made for aquavit, but is great for rum as well. That being said it is expensive when not on sale.

I'm using a crystal tumbler glass and am quite happy with it. :)

I've used a lot of different glasses. I've found that while shape is certainly important, lead content is especially crucial to research...not only can it be drawn out from the glass by what you pour inside it, but it effects the way it noses (which as you may know, aromas do effect taste because the olfactory system connects perceptions of scents to flavors). What I recommend when shopping for glasses, is to hit thrift stores and retailers who sell single glasses and buy all sorts of shapes and sizes to play around with. Once you find one you really like, then search online to determine what kind of glass it is (posting pics on forums is great help), then buy a nice set...it pays to spend a little more IMHO-- go for quality, not decoration ;) I mainly use stemmed and stemless glencairns, snifters, tumblers, and occasionally, a white wine glass. I had a custom hand blown glass with a very unique shape...unfortunately I broke it. Many different shapes of white wine glasses may be of interest...I like the cortas. Also have used specialized glasses: some for palate delivery, others with covers for intense nosing, some for handwarming. Oh, I also find port glasses preferable in some rarer cases. When shopping thrift stores, do be cautios of anything that looks like it might have had an original intended purpose other than a drinking glass-- ie; candle holders, small vases ect... which can look like it would be a good shape-- but there's a fair chance that it may not be safe to drink out of due to harmful components that can be leached out into your liquid. Another great way is to ask your forum members to post pics of any unusual glasses they have (and where to find them). I'll put it this way, if I'm going to pour a $40 dram of a 25 year old Scotch, you can bet I will know exactly which glass to use ;) just gotta experiment...but I agree, a glencairn is a good and safe place to start expediently. -Aaron