I've been using old contact solution bottles for, denatured alcohol and vinegar. As I get more I'll use them for other things. They offer pin-point application.
It is very dangerous to ever store anything that is not drinkable in a container made for drinks particularly soft drink containers. Many people have been poisoned that way, a lot of them children. Antifreeze for example is very sweet to the taste but drink a small amount of it and you will die.
You should find suitable industrial containers for your stuff and stop using soft drink bottles. If you dont believe me, call your local poison control people and ask them.
No small children around so no problem there. The bottles are marked. They were not marked in the photo because it hard to wright wearing by full bubble wrap suit.