I use these for my slide washing supplies and they work great to minimize waste of solutions. The bottle are very air tight and even acetone does not evaporate. I've had one full of acetone for over a year that has shown almost zero evaporation. The hole in the nozzle tip is very small giving you a very tiny stream concentrated to a fine point. You can enlarge the hole or cut the tip back to adjust to your needs as required.
It is perfect! The quality is great and the shipping was very fast! I highly recommend people to buy it!
I've tried to use low-quality wash bottles, old ones with an air leak in them somewhere, and dishwashing soap bottles. Never worked. This one is what you need.