Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Are the glasses flat on the bottom?  I'm concerned that they will collect water when I wash them in the top rack of the dishwasher.
Document: No problems with scratching or cloudiness from the dishwasher- I use the top rack and the glasses look as good as they did out of the box. The stickers on the bottom of the glasses were hard to get off though, I wish they didn't come with a sticker on each glass since I ordered a lot of these!
These tumblers are of excellent quality. The base is broad enough to discourage spills and they look like glass. They stack 2 high (the broad base doesn't allow tight stacking). I wash them on the top shelf of the dishwasher with no trouble. Highly recommended.
The glasses had permanent fingerprints scarred on them after washing them on the top rack of our dish washer. These are expensive glasses and you're taking a big risk buying them. Even if they replace them / refund your purchase I recommend staying away!
After reading all the reviews, I bought one set to test them out and after a week of use bought a second set. These are our everyday tumblers now. They are attractive. They work well in the dishwasher: the straight sides mean they fit within the prongs; the small dip in the bottom results in almost no water collection by the time we empty the dishwasher ; and after 3 weeks there has been no etching and they come out clean. Some reviews mentioned sticky labels that were hard to remove but our tumblers had labels on the side of the glass that pulled right off with no residue.
I got these because I'm clumsy and don't trust myself with real glass. I'm also finicky, and tired of plastic-looking plastic glasses.These are very nice. I keep forgetting that they're not glass. So far, after several weeks, they remain unscratched and unclouded despite being treated like, well, plastic and being unceremoniously dumped in the dishwasher with everything else.
For the price they are great! but they scratch up a tiny, tiny bit in the dishwasher.I would hand wash is you can...I have similar glasses 3 times the price fromwine enthusiast and they do the same thing, so I think its just the material.Great for toddlers in the house!
The glasses are a great clear color and light weight. My problem is that they do not clean well in dishwasher ( top shelf as recommended). The mouth and finger smudges remained after washing them twice in the dishwasher. They did clean well when I finally washed them by hand.
These glasses are the best. Dishwasher doesn't take off the shine. After wash, the glasses looked new. Very happy with my purchase.
My daughter was so shocked when she came over and picked up one of these glasses because they look so much like real glass. The glasses are lightweight and durable. They look awesome. I have been washing them on the top shelf of the dishwasher and they come out fine. I do dry the glasses when they come out of the dishwasher, just as I would real glass so they don't spot. Our cat knocked one of the glasses off an end table already and it did not break. I am considering buying another set already just in case they stop making them.
These are great, they are stylish and functional. My ONLY complaint is they have a tiny indention on the bottoms so they will hold a few drops of water when they are upside down in the dishwasher. It is a small amount of water, but not as bad as some other cups I've had. I've used them for over a month and they still look like they did when I got them.
Answer: They are not flat, and do hold water.  We do not find that to be a problem, as we do not use the dishwasher very often.  We really like the glasses.