I've bought DS1 a toothbrush and some socks for his stocking as that's what my mum always used to do for us. Its a tradition in our family! I always buy DH pants and socks to go in his stocking for the same reason - his mum never did that for him but he likes me doing it as it saves him buying them.
My mum to this day still buys everyday items in brands she knows we like and makes us up a little gift basket (shampoo, shower gel, soap, razor blades, electric toothbrush heads, toothpaste, even tampons and sanitary towels!). I actually really appreciate it as at least for a month or 2 I don't have to worry about spending our very limited budget on basic necessities and we can treat ourselves to a takeaway or a meal out etc (something she would love to give us but can't wrap up).