ANY FOOD QUALITY PLASTIC SPRAY BOTTLE will do or empty Heinz ketchup bottle if you can find spray with cap to fit or as such so long as you sterilize the spray top and then wash with hot water.
you can buy pump action spray bottles for the catering trade quite often used in damping the icing of cakes on elaborate wedding cakes etc, these give out a ultra fine mist .
I never realised that the plastic can leak out poison's to the food inside.
I try to use plastic for everything being in a motorhome as I'm afraid that glass could break and damage stuff.
These forums are great.