Wow. This is a tank like pill box
I purchased this item for my wife who needs pill holder for her medication. She loved it despite the pricey tag. This is a hefty and sturdy heavy duty stainless tube with perfect fit for nitroglycerin bottle. The only concern I have is the o-ring on the main tube where it is not compressed well. The manufacturer can make a small adjustment on the groove to apply more pressure on the o-ring. I tested it by immersing the sealed tube in water for 30 mins  with tissue paper on it and the tissue came out slightly wet on the edges when I opened it. But overall, it is an excellent product and well made in USA.
Rating: 5 stars