Get a straight easy open close one or send it back.
342251
Bought two, one easy to open and close the other is a thumbnail breaker to close. Flip a coin you might get a good one. If you get a good one the clip is not a pocket or belt clip, its a money clip. If you don't use money clips just crank open the clip  with your thumb and it will come off. Then its a real small nice sized small package razor knife that fits flat and easy in your pants pocket.
4588579
It's not good cuts off want to send it back .... CAN I SEND BACK......It's not good at all a mess
1531115
-I bought two of these and they lasted one year, exactly, one year.  -one just lets the door slam, and then you hear the fluid move... and the other is failing... door slams most of the time.  -completely unadjustable at this point... got the screw all the way in to "slow close" and doors just slam.  -these were cheap, but not worth the price I paid... on the hunt again for a decent door closer.

-update:
-someone at Ideal Security actually cares... they had me contact their engineering staff, they helped me select the Correct closer for my application (pneumatic, not this model), send them the old ones to investigate what went wrong, and sent me new closers free of charge!

-this is a company that cares about the customer.

*lesson learned:  there are pneumatic (air) closers, and hydraulic (fluid; this model) closers, and it depends what type of door you have as to which closer you should use. the folks at Ideal Security can tell you which model to choose with a good description and/or some photos of your application... take the time to contact them, they will help.
1428402
The item had a short where it was coming on and off. I had to open it and fix the problem.
1823566
Maje sure replacement is easy because it is not.  Contact immediately if defective as I threw the box away=wrong move
4176847
We bought a slightly different model last year, the DZT-50-9. The first item we purchased stopped working. I called the company and they issued a Return Authorization number under warranty for the top. I returned the item. It took a long time for a new top to be sent back to me, and email inquiries as to the status of my return went initially unanswered. After 6 to 8 weeks they finally replied that it was sent via UPS. That was kind of a long time to have a piece of plywood for a trash can cover.

The new item works pretty well, but the infrared is very sensitive to water. Simply washing the cover with a sponge and a quick rinse, is enough to make the sensor faulty. When we put the batteries back in the top would automatically open and stay open. We would have to manually force it closed. If we used the Close button to close it, it would automatically open right back up. And after manually closing it, it would not open atomatically via the sensor. We would have to push the Open button. After a day or two, it starts functioning again. This has happened consistently for each of the 3 cleanings we have done so far.

Something else about the design, when our first model stopped working, we would have to grab the "latch" and open it that way. The latch is very poorly designed. Of course the intention of the sensor is that you would not have to use the latch, but when the sensor fails, it's all you got. I have to think the manual latch is almost an after thought and was never sent through R&D.

So in the end, I like the trash can, but we try not to clean it very often because it's so sensitive to water. I'm not sure I would buy it again. The next time I am in the market, I'd probably just look at cans that are opened manually via your foot. Or perhaps at least phone the company and research online reviews and see if they have made improvements in the technology. I really want to like this trash can, and most of the time it does work. They just need to make a better sensor.
1992365
All of the threading isn't machined well when opening and closing. I have trouble with only that. Otherwise, its operable.
4839907
I have read the answers as to how to close it and watched the video.  Mine?  Forget it.  It will NOT close no matter how force full I am.  Perhaps just got a bad one, but it truly is no closable.
2086871
I've only had this for a few months and of course my window for return is closed, but I cant gsr the press to push down. Its stiff and won't press easily
2744771
Super easy to open up but closing it down different story. The metal got bent out of shape while trying to close and twist it back into shape but it didn't work. Wasted my money!
2667177
I wanted to return it but the return window closed. Inconsistent operation - looks & feels cheap. Will donate it to Goodwill & buy a better quality machine.
1820716
I agree with the other recent reviews.  This latest version either has a manufacturing defect with the self assist mechanism or a problem with the actual manufacturing itself. Either way it is impossible to open or close with one hand - and I had to struggle to open and close it with two hands.  It has been returned.
124730
Extremely hard to open it back up if you close it. BUT IT CAN BE DONE. Just be careful and use a butter knife.
2398143
I made the mistake to put a drop of oil in the hinge, it hasn't been able to open for the past 6 hours. Drop it in water and forget it. Came in ziplock bag, blade was grimy but sharp
2416454
I must have received a defective opener.  It doesn't open smoothly.  I have to start and restart it.  Received it as a gift after having put it on my wish list.  Too much effort to try and return it.  It's going in the trash.
2486170
UPDATE: I contacted hydro flask on their Facebook page. I was reached out by their customer service te member and they sent a new one free of cost.
just like many others have said this flask works well but that day it decides to seal shut, theres nothing that will open it. Happened to my 7 year old daughter during lunch time. teachers, security guard: not one person could open it. Wish i could return it. Waste of my $34.
3207469
The one I received is either actually defective or this is just really poorly designed. I can only get it to close properly about every 1 out of 100 frustrating attempts (the directions are not that complicated, so no, it's not "user error."). I wanted to return it and would have been happy to try another one in case this one was just defective, but this item is "not eligible for return."