Be sure to remove the plastic cap!
344669
Be sure to remove the plastic shipping cap protecting the bass radiator on the back of the unit. I never read the instructions which probably addresses this important step. I happened to find it on a blog somewhere. I thought it sounded fine and then I took it off and the bass is much better. It is almost invisible and hard to see (clear plastic). Excellent speaker!
3547591
I really like these bottles and not having to bother with plastic. However, the metal cover comes detached from the cap and needs to be superglued back on to keep them looking brand new. If you don't mind the sort of weird looking screw-on cap that's under the metal cover, once the metal cover falls off you don't need even need to bother reaffixing it.
3681683
It fits but as soon as I started screwing it onto my distributor the plastic started cracking! I just switched back to the older cap which has been taken off and on dozens of times with no issue.
1667871
Nice product but it comes with their brand sticker on the cap that is impossible to remove without damaging the product. So great, now I have a nice shiny coffee vac that has scratches and sticker remnants left on top.
930923
You have to be very careful when setting the cap on. There is an o-ring that if it does not set correctly it will spill.
1651095
Just got started with it due to the misplaced cap.
432277
Love these caps but i got the stainless straws. the whole point is to eliminate the plastic.
2472123
Works well for its intended purpose.  The top plastic cap will easily break, but if you're careful with it, you shouldn't have any problems.  I broke the cap on my first one, but it was my fault since I didn't realize where I was placing my hand and accidentally smashed it.  Never had any problems with how it functions in the 2+ years I've had my original one.
267666
I bought this to replace the $80 Braun electric kettle that has a few plastic parts with silicon glue submerged in the boiling water chamber (that can't be good). This kettle's cap is plastic, not great if you don't want any plastic leaching. To fix that, I wrap the bottom side of cap with aluminum foil and poke a hole just under the whistle hole. It doesn't look good with aluminum foil, but it reduces plastic leaching to almost none.
4206970
Defective cap. Can't open it. I'll need to break it and risk spilling it..
2630382
Good price for the quality received. It is very similar to the original cap, but I noticed that the straw was slightly longer than what can fit inside of my bottle. As such, I had to snip/cut off a portion of the straw and then use sandpaper to smooth the edge.

I didn't notice it in the product description by the manufacturer nor the description at the top. Therefore, I took off a star for not informing the customers.
4311085
I really love this bottle - including the large capacity, and the protective cover, and the very nice chain handle.  But I hate that the cap can't be attached because I have already managed to lose the top after just a couple of weeks.  I am hopeful that they sell replacement caps - but it would be a better design if it were always attached.
2391006
Does the job very well.. The reason for three stars, is please please don't overtighten the cap when putting this thing together.. It was a nightmare to get unscrewed.. IF YOU CAN without breaking it.
I learned my lesson  LOL
4377535
the mechanism that controls the telescoping cap tip has broken (very soon into getting it). it's a cosmetic issue only. but it bothers me.
2739096
Its great, but the cap comes off very easily compared to my metal one. I feel like Ill lose the cap. Everything else is great though.
2917597
My only complaint is like many others. The plastic straw piece that runs through the cap gets mold. Its not easy to remove and I ruined one of them trying to get it clean.
457356
The cap attaches to a little lanyard doo hickey so you can put it on a key ring or something. The cap detaches completely though, so its easy to lose the thing.