Review on Z-Color Fubeasi 2pcs Stainless Steel Boat Ring Cup Drink Holder - Universal Drinks Holders for Marine Yacht Truck RV Car Trailer Hardware with Enhanced SEO by Wayne Laguna

They are easy to use! I put two on an outdoor wooden swing and two on my fishing boat. So, with a little imagination, they can be a great addition to your outdoor needs. There is one thing that could help this product, self tapping screws. But with a power drill, you can install anywhere there is enough space for installation. They are strong and fit in most jars or plastic bottles. I haven't tried stainless steel insulated tumblers, but I'd say if they're smaller at the bottom, they should fit.