The inner cap is a sealing insert used inside the main cap of slim-type 5-gallon water containers. It ensures a leak-proof and hygienic seal, commonly used by water refilling stations to maintain water purity and prevent tampering.
Type: Inner cap (insert type, sits beneath the main cap)
Compatibility: Fits most slim-type 5-gallon water containers
Function: Prevents leakage and contamination
Material: Food-grade, tamper-evident plastic
Color:  White
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