Suction cup brands??

I would like to buy a couple suction cups and wanted to know if it is necessary to buy 70 dollar cups or would this < 15 dollar option suffice?

https://www.amazon.com/Qadira-Premi...+for+glass&dpPl=1&dpID=41c+MAJzAGL&ref=plSrch

looks like DAMO is a popular brand and is rated to lift up to 200lbs.( 70 each) but concerned these may be overkill considering I'm essentially going to use them one time. The suction cups I linked above are also rated for 200 lbs. but are a fraction of the cost.

I'd be open to renting heavy duty ones as well from LFS...actually waiting on response from Age of Aquariums.
 
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