Eriksen Pipe KeyStones are made for the smoker who needs a little help with moisture build up when he/she is smoking. These KeyStones absorb any excess moisture that will build up while smoking and they are perfect for the Nording Erikson pipes. We have tested these KeyStones in the office and they work great. No pipe cleaners needed and toss them out after you are done.
These are great! Add 5 or so keystones to the bottom of your pipe, load and puff away. Dries and cools the smoke and does not alter the taste of your tobacco.
These things are brilliant! I do have an Eriksen keystone pipe, but I use these in all my briars now instead of the paper or balsa filters. They work great to soak up the moisture and give a cool, dry smoke without affecting taste or air draw. And there's no nasty soggy paper or wood to deal with. You can dry them out and keep re-using them. It'll take me forever to use up the whole bag. However, they don't really trap anything besides moisture and heat, so if you use filters for reducing tar and such, these won't do it for you. If you're just looking for something to give you a cool dry smoke, they're ideal. Highly recommended!
I have found that the keystones work great in Peterson system pipes. Just put a few in the system reservoir and they soak up the moisture, making the usually unpleasant task of cleaning a snap. The reservoir stays dry and eliminates the foul smell.