2x 1 imperial gallon / 5 litre PET demijohns with bored caps, grommets, bubbler airlocks and thermometer strips by Almost Off Grid. PET plastic demijohns are a great alternative to glass. They are lighter and can be reused. These two come complete with pre-bored holes in the caps fitted with grommets. The bubbler airlocks fit in the grommets creating an airtight seal. The airlocks work one way, so they let air out of your homebrew whilst not allowing contamination or fruit flies in. Also included are two lcd temperature indicators in the form of thermometer strips. Perfect for winemaking, or making homebrew cider or mead. 2 demijohns, airlocks and thermometer strips per pack.