Thanks so much for your reply :-)
I figured it was recent because of the mold line and such, I've been checking out the bottle resource sites and it's machine made.
It was the closure and weird seal over it more than anything, I've not seen one like it before, and the hole in the centre threw me, too. I never even thought about injection bottles!
Funnily enough just before putting it on here I said to my partner, I hope it's not drugs or anything, lol. Oh well, I'll leave it posted and maybe someone can shed a little more light on it.
Cheers again,
MoroseC x