I can't think of anything - on the whole, things for everyday living have got so much better. I remember wash day - washing the clothes by hand in the kitchen sink, then carrying them dripping wet to the outside shed and helping to turn the handle of our mangle to squeeze out some of the water. Quite fun in summer, but horrible in winter when the water gushed all over your feet, and then you had to hang wet clothes on a wooden clothes horse to dry, totally masking any heat from the fire, in the days before central heating or washing machines. I also remember having an ineffectual metal box on the wall in the yard outside the kitchen, which was a bit cooler than inside in summer, where we kept the milk and meat and anything else which spoiled in the heat. I was 8 when we got our first fridge, a big box with very little room inside as the insulation was so thick, waiting in vain for it to produce the ice cubes it never seemed to manage. And I'd much rather have an electric blanket than a hot water bottle.
Still, I suppose that, if and when global disaster strikes, if I'm still around then, I shall say 'When I was a kid, we had a lovely mangle to help with the washing, and a useful outside box to help keep the food cool, and a cosy rubber bottle full of hot water to warm us up at night ...'
07 Maybe they are still produced?