Suction cups

[photographer-at-large]

What's a good suction cup that can hold GoPro up to APS-C,

or is it better to get dedicated suction cup for each camera size?

Thanks in advance for every reply. 

[IronFilm]

http://www.came-tv.com/video-suckers-video-sucker-c-91_90.html

[gt3rs]

For gopro I use the official gopro suction cup accessory. I mounted on a rally car racing on ice with no issue at all. I prefer it because it is small and lightweight with less risks of damaging the car or even worst some people around.

For heavier stuff I use this one: https://www.bhphotovideo.com/c/product/67896-REG/Avenger_F1000_F1000_Pump_Cup_with.html
But you need to always check the "pump" level, it is a very powerful suction cup so it could damage the panel if not used correctly.

[Antonis]

You will need a beefy suction cup for a DSLR+whatever lens. It will work fine for a GoPro obviously, but for convenience sake it's easier to use a smaller dedicated GoPro suction cup.

Many options available at Hague:
http://www.haguecamerasupports.com/car-mounts-suction-pads/

[photographer-at-large]

Thanks everyone for suggestions.

I ended up getting Delkin-brand unit with ball head for ~ $25.