Straight Model Fermentation Lock in Plastic

If wine or mead is left for an extended period in the fermentation vessel, you can place a bit of cotton in the top container. Alternatively, you can store the wine in the fermentation vessel itself. Another method is to use glycerin instead of water - the glycerin does not evaporate. To slow down the evaporation of water. Water needs to be present in the fermentation tube to shield the wine from exposure to air.