A superabsorbent polymer (SAP) (also called slush powder) is a water-absorbing hydrophilic homopolymers or copolymers that can absorb and retain extremely large amounts of a liquid relative to its own mass.
Superabsorbent polymer powder
Hydrogel
Expanded polymer balls
A diaper or a nappy is a type of underwear that allows the wearer to urinate or defecate without using a toilet, by absorbing or containing waste products to prevent soiling of outer clothing or the external environment. When diapers become wet or soiled, they require changing, generally by a second person such as a parent or caregiver. Failure to change a diaper on a sufficiently regular basis can result in skin problems around the area covered by the diaper.
Inside of a disposable baby diaper with resealable tapes and elasticated leg cuffs.
Different kinds of outer diapers.
Diapers on a shelf.
Unpleasant duties (1631) by Adriaen Brouwer, depicting the changing of a diaper