Bug Report: travel with Kiehl's products

For the last 20 years of my life, I washed my face with regular body soap whenever I was in the shower. I was also plagued by oily skin (still am). Three years ago, a friend showed me the wonders of Kiehl's products. I eventually found a face cleanser that became a life saver. I always thought it was dumb that I could be 30 years old and still get a zit, but that basically doesn't happen any more. For the first time in my life, I have clear clean skin (that gets oily after a few hours, but still).

The problem is even though the small 4oz bottle has a cap that gives a satisfying "snap" when you close it, I can't keep the thing closed and sealed when I fly.

It started a couple years ago, when I flew across the country and the bottle exploded in my toiletries bag. After that, I started flying with it in a ziplock bag, and every flight afterwards has ended with some leakage of blue goo. I tried stowing my toiletries separate in an overhead bin. I've tried it deep within checked luggage. Always, the same result.

I've bought several bottles of the stuff and every time I fly, I still get the leak in the cap. It surprises me that this has continued for a couple years because I figure the kind of people that pay a lot for cleansers would typically be people that fly a lot and they'd solve this.

Suggestions for a fix: I think it's time to rethink the friction-held cap. Perhaps a screw top, perhaps one of those caps with the tube that folds over to make a definite seal? Maybe make a travel-only cap for flying? Or I guess I could continue with the ziplock bags and maybe use tape, but it seems like something easy Kiehl's could fix.

update: Kiehl's customer service got back to me with a nice note suggesting that due to cabin pressure, the caps they use now will tend to open up a bit and suggest putting tape over them when you travel (duh, I didn't think to try that). A friend suggested the same tape remedy and noted if they moved to a more reliable cap it would likely be harder to flip open with a single finger, as they work now. I guess I'll start taping up the bottles when I travel now, but it was great to hear I wasn't alone in this.