the only good sauce bottle is the ones with the tapered conical nozzle. you have to buy the bottle separately and get bulk ketchup with the wide mouth to fill them.

why anyone is surprised is kinda hilarious. for hundreds of years cooks have been using bags full of viscous materials (eg icing) with conical nozzles for precision such that you can write with it and construct sculptures. no coincidence either that the conical opener is also used in 3d printers and high pressure cleaners.