Here is one of my creations that I design at the base for a personal need: add syrup or aromatic powders to sparkling water!
I know, there is Soda Stream ... but it does not change the problem, indeed, if you've ever done this, it happens very often that it overflows directly, especially when the syrup is very concentrated in sugar.
I searched the net, but not really a quick fix
So I created a special funnel that can be screwed on any standard bottle (bottle version of milk to come)
It becomes child's play, you pour your syrup, it overflows, but everything stays in the funnel and no need to do that in the sink to avoid the damage :)
EDIT : I added a version with a Vent on the side (but prefer without to avoid overflow)
I hope you will love !
Please like if you download and think to post your made one I really want to see other people prints too :)