Emboldened by my Lidl experience I left mugs in a couple of places local to me.
On the Paddington to Penzance train.
Tesco (Every little helps)
I would like to be brave enough to hang around and see what people make of them but as of yet I’ve just put them on the shelf and gone. I got caught trying to put one on an antiques stall at a car boot sale but I managed to get out of it with some charming chat. Phew!