These are great. I purchase the inexpensive acrylic paints and put one of these on the bottle, voila...great acrylic paint!!
Well worth the money.
They fit my Folkart and other craft acrylic paint .. now I don't always have to dirty a brush to get color on my paper. Shipment was quick.
I bought these to put on my regular acrylic bottles to turn them into daubers and they work beautifully. I need more now.