Some time ago when Lee Valley was offering one of their free shipping deals I addedd a package of nozzle caps to my cart. I wasn't sure if they were a gimmick or not but being Lee Valley I just assumed they would work. Well work they did. Sometime around the end of last year I had a honey do job that required I only use a partial tube of caulk. I capped the tube with one of the nozzle caps and put it away. Recently, almost 7 months later, I needed a little caulk for another honey do job and grabbed that tube of caulk. I really thought that the caulk in the nozzle at least would be hard but no, it was as soft and ready to use as the day I opened the tube up.
I know that it's not a real big deal that these little do dads actually worked but it's kind of nice to every now and then to come across a product that actually does what they claim it will do. It doesn't hurt either that it didn't break the bank to buy them in the first place. They probably are available locally for some but I've never seen them but then I've never looked for them either.