Flimsy and lightweight, and they always get stuck to the bottom of my glass
925285
These coasters look nice, but they are somewhat thin and flimsy, and they end up sticking to the bottom of my glass when there is condensation. So every time I pick up my glass, the coaster gets stuck to it and then there's a loud noise when it falls from the glass. There isn't enough weight to them that they stay securely on the table when you lift your glass. If I had to buy these again, I wouldn't.
243469
I tried these for a few weeks but finally returned them.

Pros:

They look nice.
They are inexpensive.
The rims are rounded in a pleasing way.

Cons:

They are almost laughably light compared to any coffee/tea cup Ive used; when I took them out of the box I thought they must be plastic and meant for children.

The advertised 6.5 ounces, already very small, is misleading since the cups can only be safely filled to barely 6 ounces.  Most cups hold 8 ounces safely.  Since they also don't keep liquids warm any longer than other cups, you'll be refilling frequently.

They are not stable enough to hold hot liquids.  The upturned cone shape and the ridiculous lightness of the material used to make the cups results in a very unstable cup of coffee.  Dont be fooled by the images on Amazon:  that thick-bottomed appearance, which seems as if it would give some weight to the cups bottom for added stability, is not functional but only for style.  After spilling 6 ounces of coffee all over myself and the Sunday paper I gave up on them.
2677267
These things are EXTREMELY flimsy and mine came so out of whack that after 10min of trying to make adjustments so they wouldn't sit on my head at an angle I give up. If you're buying them for a costume or something they'll be fine but I think they are terrible for everyday use. They might be metal but they're so delicate it feels like they're made out of plastic. Overall these glasses are just "ok", even for $5.
2278759
These are junk compared to the old Klean Kanteens. Super thin, rounded bottoms are unstable, and they are too hot to even hold with coffee in them.  Not sure if this is a cheaper version, or they are now just making them all more cheaply, but these are junk compared to the older versions.
1393592
For some goods, there's no sense paying a premium when you know a cheaper version will do. Not the case here. These are the WORST. Every time you touch them, the cork flakes off, both large and small chunks. The cork is loosely held together, and it has a nasty, cheap feel when you run your hand over it. They flop around and feel like they're going to snap in half at any moment. They're also thinner than an average thumbtack's pin length, which means you might end up with holes in your wall anyway. Absolutely not worth it.
2296012
Cheaply made. Suction cups fall off and don't stick well.
3339150
I have tried several different sun shades and they always fall off or don't cover the window enough. I was excited that these shades seem to easily stick to my windows. I got them out of the package and they stuck on just fine. But they are really pathetic and don't really block the sun, which makes them not worth it to me. We don't live in a particularly sunny area, but any time the sun is on my son's side of the car, it shines in his face even with these shades in place.
4058769
Pans are all too lightweight and continuously fall off balance and fall off the burner.  We have found these to not be very safe to use and they require a lot of attention to make sure the pans are perfectly set on the burner.  I would not recommend these.
4819954
These are really pretty! It's sad that they stick to the bottom of my drinking glasses. When I lift them, up comes the coaster too.
1723125
I bought a lot of these and found that the little feet on the corners get stuck in the rungs in the shelves.  They get so stuck I have to get help getting them out.  Had there been no feet they would have been wonderful.  I thought they would slide in and out so you could see the condiment bottles stored in them, but not possible.  Maybe everyone else has glass shelves.  For me these are expensively worthless.
1324295
I was really excited about these until I got them and tried then out. The bottom is so flimsy that if you drop it there is no protection whatsoever.
1724568
They are very thin and cheap looking and feeling.  They don't not hold liquid well.  I would not purchase these.  They do not hold their shape well.
2839757
I specifically ordered these to replace some crappy plastic ones I had because they were flimsy, thinking these would hold up well because they were stainless steel, real glass, etc. Boy was I wrong. It turns out that these are quite top heavy, with a PLASTIC connector right where the base of the light connects to the top of the stake it sits on. I have had no less than three of these break at exactly the same spot. It's a design flaw. I would skip these, even though they do look nice.
4777981
The backside of these frames isn't tight against the photo and glass. Therefore your photos will slip down. Overall a very flimsy product.
4162198
I ordered these based on the good reviews. We were using the plain algae wafers for our 6" pleco, which s/he loved and would sometimes race over to eat. These ones are a flop. They float unevenly and drift around the tank getting caught in the ornamental plants or sliding behind the filter intake where pleco can't find them. The ones that end up on the bottom of the tank sit there ignored until they dissolve into more gunk for the filter to handle and more water change cleanings for me.
4777002
cheap with sticky holders that lose their stickiness too easily
3729390
These look great but as the other reviews mention, they are both sticky and flimsy given that they're made out of very soft plastic / rubber.

Sticky is a problem because in your pocket or purse, crumbs and/or other nasty things might have a tendency to stick to these things. They also stick together pretty badly so if you use more than one of them on your keychain, assume that they'll constantly be stuck together.

Flimsy is a problem for obvious reasons as well. Even the act of sliding these covers onto a keychain will booger them up.

Still, as a novelty item that only costs around seven dollars, these aren't terrible by any means. Just don't expect them to last forever.

If hard plastic versions of these were available, that would be fantastic!