Sentence:  You could burn disposable <WSD>nappies</WSD> (not a very practical option); otherwise, it′s probably best to take a supply of large plastic bags or <WSD>nappy</WSD> sacks with you and to dispose of them as thoughtfully as you can. 
Meaning of the word marked with <WSD> tags:  An absorbent garment worn by a baby who does not yet have voluntary control of his or her bladder and bowels or by someone who is incontinent; a diaper.