These are vinyl caps that fit nicely onto the straws. They are either in black or white vinyl. No choice, you get what I have in stock.
The vinyl straw caps are washable, and reusable. DO NOT THROW AWAY!!
(I noticed when I use my straw at a restaurant, I didn’t know how to place this wet straw back into my purse. Using the vinyl end cap, I can wipe down the out side of the straw with a napkin, and place the vinyl end cap onto each end of the straw, so that the liquid / wetness, will stay inside the straw, and not inside my purse) . (bonus: it also protects the ends of the straw)