Bottle sleeve or funnel

I wouldn't call my self a penny-pincher, but I just hate to waste money and resources on things without a (very good) reason. One of my problems is not having the patience to get the last drops of tomato ketchup out of the bottle.

Therefore I have made this sleeve/funnel to connect two bottles. This way I can just connect the bottles, leave them in the fridge and in about a day, the content of the top bottle will have run into the lower bottle.

I don't know if there is an international ke