Lid TO 38 MTO White without button
Pasteurising and sterilizing caps can be differentiated by the temperature they can withstand.
Pasteurisation caps can withstand temperatures up to 85/90 ° C (water bath)
Sterilisation caps can withstand temperatures up to 115/120 ° C (pressure cooker / autoclave)
Caps with button produce a characteristic "POP" sound when opening them, a warranty of vaccum within container.