Granny's cache was a cache I adopted a while ago. It had been muggled countless times and I thought I could keep it alive but it has been muggled yet again. Unfortunately I have had to archive it - it was just going missing too many times.
This new re-imagined Granny's cache is not too far from the original. It has plenty of safe parking nearby and is a good spot to stop and stretch your legs and break the drive. Hopefully Granny would approve of the new location.
The cache you are seeking is a 500ml plastic screw top container.