I think baby baths are THE most useless item! They're a nightmare! Just hold your baby, get more skin to skin time with them, and hop in the shower or bath. Much nicer for everyone, and no lugging about heavy tubs or working out how on earth you're going to fill them.
I wrote an article about this for the parenting hub. We never had a change table like the one in the picture, just a mat on the floor. I liked it better because the baby can't roll off and hurt themselves if you turn your back for a second. No cot or toddler bed either.
For most useless I'd probably go with Bryony's suggestion of designer clothes. They're only going to pee'd on.
the shops do make a lot of money out of selling baby items that are not needed. First time mums buy everything thats on offer not realizing that more than half is not needed, they soon wake up to this , but too late,
The 'must-have' waste of money Rolls-Royce' prams, that EVERY Mum seems to have nowadays, even those on CENTRELINK, or not married! Wonder who pays for them? They're a real nuisance at shopping centres, particularly in cafes. Others' can get passed, & the mothers' ALWAYS place them in the walkways! Duh! Saw a group of 7 mums having lunch at medium sized cafe once, & they took up HALF the area. EVERY pram was H U G E!
we had an umbrella style pram (1985-1989). It was The most efficient pram possible. Could turn on sixpence, one handed. Could be assembled/disassembled one handed. Back could lie flat to front or back. Good for changing bub. Back could swivel 180 degrees, so bub could face forwards or backwards. Back had several degrees of 'sit up' either way, forward or back. And folded, it was the size of a folded golf umbrella, hence name. Our 'change table' was 180cm long & 90cm wide, on castors, on carpet. And high, so no sore back, as I tall. Built to my specifications. It was well set up with u-shape change mat, so baby couldn't roll. It eventually became kitchen table, & as on castors, could roll out to let kids in to be seated.
Lasted 40 years!