Plan to return only b/c of difficulty removing cap inside bottle. It's intended to keep paint from drying out, which is probably good, %26 a card indicates as such inside box. However, there's no instructions or tips on “how” to remove it to access the paint. Tried opening 2 bottles - first one took about 10 minutes prying out w/a butter knife, 2nd on took over 20 minutes to remove. Appreciate the variety of colors %26 decent price but it's too time consuming %26 unpredictable to remove the inside cap.