One method I've used is to melt some vasaline in a double boiler (pan over hot water), dip the cotton wool balls in the melted PJ, then squeeze them out in a Garlic Press.
A bit OTT, but I had time on my hands...
A handy way to store it is in a drinking straw.
The wide bore ones from fast food joints are best.
Fill them with the CWV mix and heat seal the ends.
Ideal for your pocket survival kit, plus the plastic straw burns hot.