What is this plastic thingy?! Before I get rid of it.

[HelpLegalAdvicePlease]

As per the title. What does this belong with or what is it for? I just know I'll get rid of it before realising it's actually an important part of some appliance. I hope the pics are clear. It's only 4cm (1.5inches) in diameter.

Thank you to anyone who can shed some light.

Inside of a travel mug? I have a similar looking part in mine but its black

It's part of an Avent baby bottle. I think it goes with the toddler spouts.

Looks like part of our over counter lights.

Possibly part of a breast pump too - I think they were the same or similar parts.

I would keep it for a while it is no load to carry and as soon as it is off and down the road with the binmen you will remember. # ask me how I know.

Ooh @Soupdragon you're the best thank you so much!
I have been sorting my breastpump, steriliser etc to donate to a baby bank and found it loose in one of the bags, but neither instruction booklet shows this part. I will leave it with everything as at least now I know it does go with it. There are indeed some avent bottles too.

Thank you to everyone else as well. I didn't think I'd get an answer so quickly

I occasionally still find one at the back of a kitchen drawer and my youngest is 15 😂

Yeah @FinallyFluid that was exactly my fear! Either that I got rid of it and realised I did need it (wouldn't be the first time ) or that I give the stuff away and they'd be missing a part. Glad I got my answer.