I thought Tul pens were not supposed to leak or ...
347384
I thought Tul pens were not supposed to leak or skip...the first time I bought them, I had no trouble, but these skip and leave my notes sloppy and ugly.
697766
When I received the pens, 1 did not work at all and on 3/12 the colored liquid had leaked into the top chamber of the pen. They're a cute idea and I couldn't beat the price but I'm very upset that j got shipped a faulty product
2827369
Having issues with the pens cutting out as I write.  It almost seems like they have air bubbles or something?  If you leave the pen for a while and come back, it will work again.  I suspect it's related to storing them sideways,  will try storing them vertically.  I'll update the review after I see if this fixes my issue.
2671730
If the ink leaks, it will never come off.  Recently the ink in one my pens began leaking and my bag was ruined. Usually, you can take ink out by using alcohol. This ink is different. It will ruin your bag. I contacted Fisher and the customer service people responded like they could care less about helping me. Totally disregarded my concerns and didn't offer much in the way of help. My favorite bag is ruined forever because of this stupid $10 pen.
4595008
These pens were great, but unfortunately some of them did leak. There was little damage done to the pencil case, but I would not recommend that you only buy these pens. Maybe I just got a faulty pack or I was just not handling them in the bast of ways. It might be heat that causes the pens to leak, I don't know. I do recommend these pens, because they do have extremely vibrant colors, and I would also recommend a metal case, if the pens did leak.
1663231
When I first started using the pens they worked amazingly! I liked that they are so thin! After writing with them for a while the pens stopped working, when I pulled out the ink I can see that they are still full so it's not that they are out! And this has happened with all of the pens! I'm not sure if they are drying out or the in is clogged up but they are useless now!
2862648
I unscrewed the top to see what the seals looked like and they accidentally fell into the toilet. I put them back in, screwed the top and easily installed the fill valve.  It kept leaking from the top where I had unscrewed to look at the seals.  I tightened it but it didn't help. It filled fine but water kept gurgling out from the top. Finally I decided to look at the seals again.  They were wet so I dried them off and the inside where they were seated I also dried off. Then I replaced the seals and screwed the top back on.  Never leaked again.  Fills nicely and no more problems.  I wouldl buy again but don't unscrew the top unless you really need to look at the black seals.
4102426
I thought I loved this set until I tried to pack something with a little bit of liquid in one of the  smaller containers and it leaked all over the place. It hadn't even occurred to me that something marketed as a lunch container set wouldn't be leak proof. Also, the size of the sandwich box was a little bigger than I would have liked for a child's lunch. The colors and shapes of the containers are fun, but because it leaks it just doesn't work for me.
3412064
Several of the purple ones were bought for me. Every last one of them is leaky and puts clumps of in on the page as soon as I put pen to paper, and then the tip of the pen ends up coated in ink (outside of the ball point of the tip, on the sides, all over) so I can't clip these to my shirt or put it in my pocket, or I will end up with ink everywhere, as even if it's clicked closed, there is ink transferred onto the cover that the tip retracts into.
1709220
just got pens today and am happy with them for the most part. Was really disappointed to see the metallic light green pen ink had completely leaked out before I got to use it.
3395563
I really like the pens and the case they come in but they were small and I have already had 1 leaking I like the flow and coverage though. If I wouldn't have hada leaker I would have given 4 my main issue is the size of the pens
161156
For the amount that you pay for Kleen Kanteens, you would think that they wouldn't leak in your backpack. Sadly this is not the case, I've had 2 of them and they both leaked with 2 months of use. The lid is the problem... The plastic O ring shifts after use
2055655
Great pens when they work - All of the pens that I use most of the time started leaking badly - whenever I open the top I get ink everywhere. Had to throw them away.... Defective item maybe?
1853594
I love pentel roller ball gel pens,  with the check fraud proof ink,  these are great.  So why 3 stars?  Because for whatever reason,  ink comes out of the cartridge and you see it spilled into the top near where you click.  So whatever reason,  i lose like 1/3 of my ink because of this leak?  So if uniball fixes this, it'd be a 5 pen as i still use these but i only buy a few to write checks now.
4766329
I love these pens and use nothing else.  My one complaint:  whenever I fly, at least one of my pens will leak right where I'm gripping it. Fortunately I haven't gotten the ink on my clothes, just on my papers and hands.  So if you travel, look carefully when you pull out a pen.  Otherwise, I LOVE them.
113447
These pens perform as they are intended to. Let it be known, do not shake these pens or nervously tap them if you are using them to write. They are not designed to be vigorously tapped on the desk and will leak as a result. I found this out after it happened and I contacted customer support. The pen, when left to perform its pen duties, will perform as designed.
3759977
Always have been using Pilot pens for a while and never experienced this situation. First two black ink pens were great and the rest leaks! Ruined all my notes. Look else where people.