KLT's Patented MXC³ Black 500 Media Transfer Bottle 38430 Cap corresponds with proper 500ml volume bottle, allowing for quick confirmation that each bioreactor experiment is set-up properly. Assembled with weldable tubing, V-cut on tube end to eliminate suction to bottle. Packaged in single-use, sterile Tyvek Pouch and positioned specifically to allow for controlled opening. Available in packages of 10, 20, or 40 caps. (US Patent Number: US 11,026,498 B2)