frictionlid
nounUK /ˈfrɪkʃənlɪd/
US /ˈfrɪkʃənlɪd/
A lid that stays on tight because it rubs against the jar.
She pushed the frictionlid onto the jar until it stuck.
OTHER MEANINGS
2. A cover that holds by rubbing force instead of threads or hinges.
The frictionlid popped off when the jar warmed up.
3. Any cap that seals by squeezing against the rim.
He replaced the broken screw cap with a frictionlid.
4. A lid designed to resist slipping by surface grip.
The frictionlid kept the paint from drying out.