Corks: Plastic Top, Synthetic Cork, NomaPlastic Top Corks, Synthetic Noma Cork. Plastic top corks are suitable for corking corking spirits, oils, vinegar, or wines which will be drunk within a year after being bottled. They are also nice for resealing an unfinished bottle. They can be inserted by hand. The bottles should remain upright. Push in plastic top corks made from Synthetic Cork. Sold in quantities of 25,100, 500 and 1000 per package for your convenience. Select your quantity.