Wow, that's insane durability. I've gone through so many cheap syringes that crack after like ten uses. You must have found the holy grail of brake bleed tools. What brand is that thing? I need to get one before my next project.
Man, that reminds me of my buddy's old pressure bleeder. He bought it used like fifteen years ago, some generic aluminum canister with a hand pump on top. The thing looked like it survived a war, all dented and scratched. He used it on everything from his daily driver to vintage bikes, must have done a thousand jobs. Finally gave out last month when the pump seal just turned to dust, literally crumbled in his hand. He was almost sad to see it go.