I tend to be lazy about cuttings. I generally stick a twig in a pot of soil and let it fend for itself. I found a spray bottle of water is handy to mist them whenever I pass by. Although some models can hold up to 4 gallons, I find that a filled 2 gallon sprayer is the most I want to lug around the garden. Although there are metal sprayers, I prefer the plastic because they are lighter, and I can see how far I have filled the tank, and later, how much is left.
Pressure is maintained by pumping the handle on the top of the tank.
Some models have plastic wands, others brass. Or lack of. Handheld sprayers have a tube that extends to the bottom of the tank. The pump builds up air pressure in the top of the tank, forcing the spray mixture down and into the tube. The mixture travels up the hose, through the cutoff trigger and wand to the spray fitting.