There are several versions of the increasingly popular Tummy Tubs available. The baths, which look like buckets, are supposed to remind the baby of the womb. The baths position the baby in the fetal position up to the neck in warm water.

The TummyTub is the original.

More tubs below.

Spa Baby European Style Tub, $54.99

Prince Lionheart washPOD, $28.
Or you could just buy a bucket for around $10.