I will be moving in with my mother and consolidating households in the near future, so at this stage I am not buying anything I can do without for a short period. So I'll be pushing in corks for a few months then either find it in the move or just use mum's. I'll add it with the broken beaters to the list I need to make sure mum doesn't declutter!
She is currently curled in her favourite hanging basket. Obviously I can't wake her up to check but it seems highly unlikely she would have stolen the corkscrew and managed to carry it up there. She's only little and has no teeth for gripping such things.
I have checked both the cupboard which collects random tools that should mostly be outside and the pegboard storage areas where screwdrivers are and there is no corkscrew ☹️