It was the Oramec. It didn’t come in a box so no adapter there, and it didn’t have it around the neck. Looking online it refers to using a gun but who knows how! It didn’t even have holes in the plastic at the bottom where you’d normally thread through something so you can sling it over your shoulder.
Tried the white wormer lid but the threads were different so wouldn’t screw on tight. Also tried the (unused) Crovect cap which was too big. Employed the other half’s help and he found a cap that had the same thread (part of some thing he uses as a heating engineer) so managed to get that on with a load of ptfe tape. It was a palaver to say the least.
When the white wormer runs out I’ll definitely be keeping the bottle!!