Bath seats. Useful for singleton babies. A veritable essential for twins.
When babies are very young, it is pretty much a given that you have to bathe them one at a time. For that, I highly recommend a baby bath on a stand. We did put the baby bath on the floor for a while (I was very scared of dropping a slippery baby) but that really hurts your back after a while.
Of course, a sink is also an option for very young babies.
But once baby(ies) gets a bit bigger, it’s time to graduate to the big bath. Holding one baby in a big bath (when they can’t sit in water on their own) is yet another way to absolutely strain your back. If you’re on your own with twins, not only will your back hurt twice as much, but you won’t be able to bathe them together. And twin babies are loads of fun when they’re bathed together.
The solution we have found is to utilize bath seats. I’d never heard of these before I had children but they are plastic seats with suction pads that stick to the floor of the bath. Stick seats down, fill bath with water (BabyBoy and BabyGirl are big enough for a pretty deep bath now), pop baby(ies) in and let the splashy fun begin!