A silicone cup is the best choice

  • Easier to apply than the original metal cup
  • Traction can be started immediately after applying vacuum
  • No need to wait until a caput has built up


  • Extraction must be synchronous with the contractions
  • Abort extraction if the cup slips more than twice
  • Abort extraction if not succesfull within 15 min
    • Severe damage may otherwise be the consequence