Amazon offers the Braun Syncro Shaver System Clean & Renew Refill 3-Pack, model no. CCR-3, for $13.99. Order via Subscribe & Save to cut it to $11.89 with free shipping. That's the lowest total price we could find for this quantity by $4, although we saw it for $1 less in October. These cartridges contain cleaning fluid and lubrication for Braun Syncro System electric razors. Each cartridge lasts about 30 cleaning cycles.
Of note, be sure to cancel Subscribe & Save after your order ships or you'll be billed for subsequent shipments.