This cap allows for shrinking of taller size bottles in the S3 Steam Machine. With the addition of this cap, 1000ml tall bottles can be done with ease. Just slide over the steam chamber lid, remove the basket and place the S3 Steam Machine cap over the top of the chamber for a few seconds to build up steam. Then, while using the heat/steam resistant gloves, remove the cap and place the container slowly down into the machine. Place the cap over the bottle to shrink the sleeve.