Buon Vino universal stoppers are available in a variety of sizes for most wine and beer making situations. They are available in either a solid or pre-driled style. The large size fits demijons, intermediate will fit better bottles, medium size will be suitable for some erlenmeyer flasks, and standards will fit carboys. They are dishwasher safe and can be sterilized. The pre-drilled style will accept a standard size airlock.