Do you lick envelopes? We mail a LOT and the pre-sticky envelopes are expensive. One day a few years back I discovered this stuff and decided to give it a try. I’m hooked! It’s kind of like the bottles with water and a sponge on top, except this is sticky water so my envelopes all close tight and seal fast. I put a paper towel on the counter, set then envelope down with the glue strip up, slop on this stuff & close it up. Bam! Done. It has a cap so it doesn’t dry out ( sometimes you have to give the bottle a gentle squeeze to get the juices flowing, but it has never been an issue). The girls in the office insist on the stuff now so I buy it by the bulk in these 12 packs. The price is right, and I really don’t want to take a chance on something different to “see if it works as well” or “ save a little money”. This isn’t expensive, it’s cheep for how good it works. Please don’t change your formula!