Are the caps plastic or metal?
777939
A kind of thick and strong black material. Not metal. Metal would cause rusting, I believe.
773416
The caps are not or at least don't feel or look like they are the piece that holds the cap to the flask is plastic though I've used mine several times and given them as gifts and no complaints
357805
They are all plastic. No metal. After some use they rust. Will not last long. They only turn on with motion. So if your stopped they will not be on.
38804
They are made of metal. I have ordered more than 50 of them for my office and they have served our needs well.
213482
They are plastic, but my son broke two of the clips during games. I am not happy with the durablity.
415170
They definitely aren't plastic. I'm not sure if they're stainless steel but they are some kind of shiny, steel-like metal. They're actually pretty sturdy.
2222609
The end caps are plastic the rest is metal. They held up well for me, but the pins to adjust the weights took a bit to get use to (they would stick sometimes)
773414
No the caps are metal. To be honest these flasks are pretty nice. It seems like some that would sell for around 10 a piece. It's does have some spongy material inside the cap. But it isn't rubber, more akin to something that would be packing material.
2123994
They're plastic. I loaded it pretty heavily and the only thing that ever failed was the lousy wall attachments it comes with. Replaced them with molly bolts and this thing was great.
124142
the tops are metal with a rubber washer. so worth the money. i use these for everyday use at home then i went and bought some plastic ones to take to work. went green and loving it.
344324
Yes, they are plastic, but thy look like glass. They are very nice looking.
966572
They are metal. Be aware, however, they are not easy to install. If you can't solder or weld find someone that will install them for you before purchasing.
499777
As far as I can tell they are plastic. and not made the toughest but I have to say I love them as they are perfectly focused at the correct distance FOR A COMPUTER.
2233963
Plastic. but they are not watertight. They have little holes around the top for air to get in.
1721656
As the previous person noted, metal and plastic. Do you want to buy my set? My husband used for about two weeks after surgery, they are in excellent condition.
1941364
The ones I got were metal, they look great, but I did hear some of them are plastic too... I would call them to make sure..
2189291
They are plastic.. I really like them better than the regular pump bottles.