Review (5/5): yep, these work for a while
These are basic, probably about as basic as you can get and they function as expected. The ultimate test for us was to give our little ones a bottle each for their "scientific experiments." After many filled bottles of various contents - ranging from beet juice and vinegar to bath salts with bits of bar soup and shampoo mixed together - the sprayers still worked (if the contents were thin enough to get sprayed out) and the caps and bottled themselves did not break or leak after slightly rough use. I can't say they will work for a year or more, but certainly in the shorter term they are great.