Was in local Sports Direct today to get a pair of those Heat Holders socks and noticed loads of slippers on sale at £1.00. Various styles, sizes, colours etc starting at £1.00. They all came boxed as well. Not my kind of thing but might appeal to some. Also, on their website but delivery charges will apply.
Apologies if posted already but couldn't find a similar thread - possibly because it doesn't appeal to many but thought it was worth a mention.