What are these?

[Qcng]

They've been sat on my kitchen windowsill for forever, no idea what they are. Can't throw them away bc I keep thinking "I'll realise what they are and that I'll need them one day"
DP thinks they're a nozzle for icing a cake, but they're not.

Use Google image search op.

They look like something from medicine syringes/bottles.

Are they caps for an in ear thermometer?

Have you got a pocket mask? It looks like the valve to one of them.

May be too thick for that though

They look like the things you get with kids medics to put into the neck of the bottle so you can string out the right dose

Are they the inside of a Nurifen bottle, you know the ones that fit a syringe in?

There the caps that come with syringes. Had these with my daughters medicine. You insert them into the bottle then put syringe into them

I did already ask Google. It brings up medical/bathroom/other weird pictures but no actual match

Hmm, all of these replies are helping me think...
I am thinking something of a "medical" nature. Definitely looks like they might belong coming out of some sort of bag or balloon thing.

Or are they inserts for blowing up a paddling pool?

Fleefly that would make perfect sense bc I have a young child. Weird I can't remember using them at all, maybe that's why they're just left lying around!

They are syringe adapters for bottles. I often use them when giving medicine to DS.

Yes I just checked my Calpol and the top of it is almost identical, so I definitely think they must have come with a cough syrup or something so you have the option to syringe the amount out rather than pour.

Thanks Mumnet!

Still don't know if I should know if I should keep them 😅

I use these. They are bottle stops to use a syringe into a bottle without spilling.