Review on Vacuum Suction Cup Camera Mount With Hand Pump And Threaded Base - Ideal For Glass And Car Surfaces by Ricky Mills

I needed a way to attach some things to the exterior of my RV for a cross-country trip and didn't want to drill into the body. These babies worked great - I attached them and they stayed attached for about 2 months so far. I used them in 2 places: 1) as supplemental support for a bumper-mounted scooter rack on the back of the RV and 2) to hold a large, soft-sided luggage bag to the top of the RV. I would check them every day to see if they lost grip, but they never required pumping or re-attachment. I highly recommend these beasts!