Use the bungees from your paddle board to secure your can of beer while you're actually paddling … 

The original used more material than was necessary and i hate infil 
So this version strips it back into a more ribbed shape which should use less material with no loss of strength. 

Print instructions (for prusa slicer) 
mine was printed with 3 perimeters, 2 will probably do it fine. 

There is a box floating above the model in the STL, its there on purpose. 
select split into objects and the box will fall into the perfect spot and will be the ideal size to be a modifier. 
then merge the box and cup holder back together, then convert the box's type to a modifier. 
And select the box to be 100% infill. 
this will add strength in a high stress area but is an optional step