A water spraybottle has many uses for 'dwellers, and also tends to use much less water than other approaches:

• hygiene
  • wet and rinse toothbrushes
  • pre-wet hands before cleaning
  • re-moisten dry wipes
• cooking
  • wet unruly coffee filters to help hold them in place
  • moisten leftover foods before reheating in a pan
• cleaning
  • pre-wet utensils to soften dried foods before cleaning
• HVAC
  • spray on skin and clothes as a “poor man's swamp cooler”.