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The suction cup is designed to have anextra strong hold on any smooth non-porous surface, but for best result, mount the suction cup on a glass¹ or non-porous plastic surface, as found on our Non Skid Base with Plastic Plate, Plastic Adhesive Disk and Cup Holder with Plastic Plate.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.