Great concept, but it leaks
929492
The concept of the product is great, it just doesn't fit the wide mouth Nalgene bottle as well as advertised. I found the cap a little hard to tighten down all the way on the bottle and when I finally did, it leaked on me. The leak came from the interface of the bottle and cap and not the drinking cap. Maybe there is something wrong with the threading, but it isn't great to have a half shot of water go down the front of you every time you take a drink.
3870448
... it's NOT leak proof, if it tips even a little bit it definitely leaks. I will try exchanging it, hopefully I'll receive a next one that doesn't leak :/
154191
It leaks. I bought it a month ago. Yesterday I used it for the first time. I found a little hole on it and I had to pump it every 2 hours.
252224
I love the idea behind this product, and upon first examination it feels sturdy and well-made. However, having used these for only about a month (I have two cats), I have already encountered two incidents where urine seems to have leaked through the bottom of the box. The sections of the box walls that are indented, where the indentations begin and those inside edges meet the bottom of the box, seem to be the most vulnerable areas. Inside the box, these areas form small, "sharper" corners that I believe aren't strong enough to withstand contact with cat urine (and they are not as strong as the "normal" corners of the box, which have a smoother surface and more gradual curvature). For anybody who's curious, I'm using SmartCat grass-based clumping litter, and yes: I do scoop the box very regularly. I shudder to think what might happen if I used this box with non-clumping litter!

It seems wrong to advertise these so confidently as a product that "won't leak", because it certainly seems that they can and do leak. For now, I've had to line the area underneath and around the box with paper grocery bags to try to catch future leaks before they get to the carpet, but I think I'll need to buy a waterproof litter mat to go underneath the box if I really want to protect my carpet.

Other than that, the concept is great, and disposing of my first one was very easy - no deep-cleaning, just put it in a garbage bag and throw it away. It fits into a standard kitchen-sized garbage bag. I'll probably continue using these (with a mat underneath) because the maintenance is so easy. Cleaning a flat litter mat occasionally seems far preferable to deep-cleaning a plastic box.

One nice thing about this product is that since it's disposable, you can just stop using it when it's due to be discarded if it's not the right fit for you (no need to find a new home for the item in the same way that you might for a plastic box). The price is great, too. I just wish these were actually leak-proof.
3089533
great concept but this started leaking near the handle not long after I got it. So now it waste so much water and makes a mess. Very unhappy with it.

***Update! So The first hose started to leak and I was super impressed and after I left the first review they sent me another one! That is good customer service so I'm hoping this one does better!
1025026
It leaks quite a bit.  But almost every cup with a straw I have tried leaks.  Any suggestions with good sippy cups w/straw would be greatly appreciated.
4252293
This lid is great for keeping the straw clean but it leaks.  I left it in my car and it leaked all over the front seat.  I love the concept but the leakage needs to be fixed. I thought maybe I had the lid not screwed on tight, I checked it and rechecked it and it still had a a slight leak.
2320750
Great concept, graduated dropper is just awesome! However - our flask leaked from get go. We at first thought we were being sloppy with the dropper- but the volume in the flask dropped steadily even without use and left a ring of oil in fridge. Switching to an Erlenmeyer flask but using the awesome dropper.
4429024
I wanted to like it, I really wanted to like it.  I mean look at it, so compact in a nice little package perfect for small spaces or for traveling, bub, sadly I just couldn't.  It leaked, water shot out everywhere and after about fifteen seconds and a good soaking it stopped working.  I dried myself of and tried again, carefully following the directions.  Same thing, I could have skipped my shower!  Love the concept but it needs some tweaking.

***edited*** after receiving a replacement unit I had no problems with water leakage or power supply.  This item will be great for travel, compact and easy to store and put together.  I'm looking forward to using it on my next trip.
3653201
While I love the concept, these leak terribly. They leak from the edge of the lid and from the top (even when the slider is in the closed position.)
2869356
It's a nice bottle, but it leaks anytime it is not upright. I have tried to bite the nipple to let the water go back in the bottle, but it still leaks. I left one half full in my trunk for a week and when I finally got it out the whole trunk was wet and the bottle was empty. It has held up well, but I wish it wouldn't leak.
2838237
Started leaking with first use. :-( I really liked the idea of this hose compact for easy storage plus I had purchased a 50 foot one at Home Depot that seemed to be working fine for a while before I decided to return it to purchase this longer 100 foot one on Amazon since Home Depot didn't carry any 100 foot ones. :-(
1029559
Unfortunately it was leaking out :(. Otherwise I loved the idea, but...
2743314
The bad part about this container is that it will always leak very slightly where the lid is. I've bought like 3 of these and every time, it's as if the lid doesn't actually fit it right or something- like as if the lid isn't tight enough.
The upside is that there is this little, soft, plastic thing in the center of the lid that allows water to flow faster out of the other end. It's because there's a small hole in the center of the lid (no, the leak doesn't come from there), and you can easily plug it with that aforementioned plastic "thing" when not in use. For some reason, such a gadget is hard to find. When the whole is not plugged, air can go into the container while water goes out.

But anyway, the lid will never "be tight enough", so forget ever leaving this, say, sideways in your car when you drive with it, or without being kind of awkward as you carry it indoors without a small trail of water being left behind you. Jeez.

But honestly this thing works great
1051255
I love the design of this bottle and it's easy to transport and drink from. However, as others have noted, it randomly leaks. I'll drink water from it and then water just spouts out from the collar for no reason. I'd live with that, but there's a HORRIBLE plastic smell from the lid. I've tried washing it and it isn't dissipating. Disappointed.
305379
Leaks a lot. Not sure if mine is defective, but it can be annoying at times
4782320
Love the concept. However - sippy spout leaks! Cannot get it to stop... and not dripping - POURING!

Other than that - bought for traveling - so far so good (cruises, planes, etc)