Instruction: Answer the given question using the supporting document.

Input:
Question: Are these glasses stackable?
Document: dont like these glasses at all.they are impossible to look clean  any suggestions  i want the tinted ones  i will never use these
I didn't need the 13.5 oz glasses so I gave them away and that person loves them, too. My husband likes them because they hold lots of liquid so fewer refills needed.
The appearence is so realistic, so similar to real glass. I've only had them for a couple of weeks; I am very satisfied with these glasses. I would reccomend them for normal everyday use.Great ice tea glass.
Heavy duty, very colorful tumbler set - for a great price - love them!!! The only thing I don't like is the lip on the bottom that water collects in when you put them in the dishwasher, but you can't find acrylic glasses without that.
I loved the shape and concept of these glasses, but 3-5 washes in my dishwasher and they are cloudy and etched horribly. The divot in the bottom of the glass also collects water in the dishwasher so they don't get completely dry. Not worth it.
These seem to be good quality acrylic glasses. They look like real glasses. I have yet to have any issues with them, and they have all gone in the dishwasher with no issues. I purchased these because I have a rather nasty track record of breaking glasses. So far, no issues :)
Love the vibrant colors (true to photo). Fit comfortably in your hand and go through dishwasher well without streaking. When inverted to load in the dishwasher, water wells in the inverted bottom of the glasses. I avoid its running down the sides by carefully sliding out the top rack slowly once the cycle ends.
I've been through several sets of glasses, in fact, one 18 piece set that was purchased only 6 months ago (and now I have just 11). I have two grade school children who are required to put away dishes and do clean up with me at night. They have washed well, and seem to resist my 'well water' spots.
This product was kind of expensive, but it was worth every penny. Here's why:1. TRULY shatterproof, while other such glasses crack when dropped from high up2. Well made and well designed3. Color is even, not splotchy4. 16 glasses are a lot of glasses5. Perfect sizes and stacks to an extentSeller delivered on time and after hundreds of uses, it's holding up.
I saw these at Costco and didn't pick them up. I know, I know, when you see it there you have to buy it. I was happy to find them them on Amazon. My old acrylic glasses (I got as a gift) I didn't care for. The main reason was because they were too thick and not comfortable drinking out of. The other is because they were not dishwasher safe. These are thin and I can throw them in the dishwasher if needed. I like that there are two different sizes and love the colors.
Answer: We find that the short ones are stackable (in twos), but that our shelf is not quite tall enough to stack the tall glasses.