Suction cup, suction cups with stainless steel clip.

Small 30mm metal bulldog clips.

Double Cup Suction Lifter - Screwfix

Vacuum Pads for Handling Systems and Lifters

VACUUM HOOK - Booms / Lane Rope Markers - J. P. Lennard Ltd

Vacuum cup hi-res stock photography and images - Alamy

16 Pieces Suction Cup Clips Plastic Round Suction Cup

How to Make Suction Cups Stick Better: 12 Easy Tips

Tatay Quick Fix Wall Fixing System

How to use a suction cup? - Kingfar