Striludo 3 Packs 5 Gallon Water Jug Lids，Replacement Water Jug Caps,Reusable Silicone Leak Proof Jug Lid for 55mm Bottles

I bought two different ones to use with my 3 gallon bottles from Walmart and these were better than the more popular one. These fit over the the lip of the bottle easily unlike the other set which needed a lot of pushing and just fits oddly (yes I'm using them correctly, not rocket science here). Even though they go on easily they're snug and seals the air so I can use it with the electric vacuum pump to dispense water. I have not tried turning the jugs upside down but they do go sideways momentarily when I take them out of the sink from under the faucet. These also come with detachable closure flaps or whatever you want to call them. They get in the way of me putting on the pump so I just remove them unlike the other more expensive set I bought. You can leave them hanging if you want.

Middle plug falls out the easiest of all types of these I've tried, does not sit in neck very well at all.

You kinda gotta fiddle with them a bit to get them on but after that it's good and doesn't leak

I was a little nervous that these things would fall off as soon as I flipped our 5 gallon bottles upside down to put on the cooler, but these things surprised me in a big way. They are better in every way than the "semi-in disposable" ones. Much easier to remove and install, I haven't seen a single leak and they secure very nicely to the bottle. Definitely makes trips to refill the 13 bottles we have way less dreadful. Not a single complaint about them and I would definitely buy again.

I purchased these and all the images show the centre hole that opens up. Well the ones I received were just flat caps. No way for the jug to release water unless you completely take the cap off first. So stupid. Sent back.