So glad I posted about my peeve. I mean, it's just a personal vexation, but I keep wondering why the vendors use this type of cap. They really aren't convenient to the user, unless you happen to walk around with a prying tool (I've lost dozens of pocket knives and don't need a knife enough to wear one on my belt). Or, you use the whole can at once, so you don't frequently open and close it.
Thanks for sharing your solutions to the cause of my vexation. I had to laugh at Boatman's use of a plastic, flip top bottle. Since Covid, I've kept one of those, filled with alcohol, in my truck. I use the alcohol to wipe down my hands as soon as I get back in the vehicle, trying to keep the cab sterile. But it's the isopropyl kind of alcohol from the drug store, which, BTW, is available in spray and screw-off topped bottles. Duh! I never thought of using it in the shop for denatured! And I never thought of reusing the isopropyl bottles in the shop. Nothing but in-the-box thinking on this topic.
But I really like PeteS's adopted idea of turning the cap into a spout. I recently uncovered three syringes in the shop. I had used them for micro glue jobs 40 years ago. The needles are corroded. They are going to be adapted and become spouts I will glue to the stupid pry-off tops. Most of the time I'm using alcohol (the undrinkable kind) I'm just sloshing some onto a rag or a surface I want to clean. The syringe body will become a squirt spout on the pry-off top. I can just aim, then squeeze the can to squirt out a bit of fluid. Evaporation through the tiny spout opening will be minuscule, and the syringe has a cover I can snap in place when I'm not using the solvent.
Thanks, canoetripping community.