Bottle sleeve or funnel

thingiverse

I'm definitely not a cheapskate, but I do get annoyed when money gets wasted on unnecessary things without a solid reason to spend it. One of my pet peeves is not being able to squeeze out every last drop of tomato ketchup from its bottle. To solve this problem, I came up with the idea of connecting two bottles together using a sleeve/funnel. This way, I can simply attach the bottles and leave them in the fridge for about a day, allowing the contents of the top bottle to slowly drain into the lower one. I'm not aware if there's an international standard governing ketchup bottle sizes, but this sleeve fits perfectly on Stokes (my preferred brand) bottles, as well as the squeezy-bottles I bought at our local hardware store and two other types of dressing and BBQ sauce we had in the fridge. The inner diameter of the sleeve measures 36 mm, with a thread pitch of 4 mm. The design ensures that the sleeve itself doesn't come into direct contact with the ketchup, as the two bottles touch when connected.