I am about to use my refill of Tabac I bought in May of 2018, in the bowl I bought in late March 2016. Yes that long. I have tried a few soaps recently , and maybe three I have away in the past. I always prefer Tabac so far , especially with straights. I now have a bowl of Stirling I really like and MWF and Williams to try as well. Just restating what others have said in the past and sharing my experience.