winsor and newton london england ink bottle

Hi all im after a bit of advice i love collecting bottles have quite a few now what i hunted out at boot markets but 2 have got me puzzled and cant find any info on.
i have a small about 3 inch high ink bottle with windsor and newton london england on it but the company is still running today and i cant seem to find any info on that bottle or its age how much its worth etc i wont ever part with them as i love them

also have another ink bottle which still has the stopper in it very worn away and like an ink pen nib type think stuck in it inRSB stamped on bottle but other than that i dont know
i wonder if any one can tell me what the piece i inide the bottle is called and any history etc about it

also have a co-op london milk bottle does anyone know where it was made i cant seem to find anything on this either and any ages for my bottles many thanks for any help