I recently bought this funnel because I make a lot of different syrups. I bought it because of the indentation on the part that is inserted into the bottle. Unfortunately, this indentation is too short, so that no air can escape when filling and I have to hold the funnel in my hand, as with the many others I already have. Burns from boiling hot sugar liquids on the hand are inevitable. Unfortunately, this purchase was a flop.
Very practical, e.g. for filling an open tea directly into a thermos flask after brewing
practical