I had a little look, but couldn't see my favourite - Codd-neck bottles that used an internal marble as a sealing mechanism for fizzy drinks. They're quite rare as children used to break them to obtain the marbles.
(I used to believe that the old term "codswallop" was derived from those bottles as you'd give them a wallop to dislodge the marble. However, it looks like Hancock's Half-Hour from 1959 is the first recorded usage of it which wouldn't fit with the usage of Codd bottles)
https://en.wikipedia.org/wiki/Codd-neck_bottle
(I used to believe that the old term "codswallop" was derived from those bottles as you'd give them a wallop to dislodge the marble. However, it looks like Hancock's Half-Hour from 1959 is the first recorded usage of it which wouldn't fit with the usage of Codd bottles)