Shower Curtain Holder

Two shower curtain holders. One slides over the existing, small suction cups on a shower curtain and then a larger suction cup slides in the other side (easy install/no shower curtain modification). The other version, called "flat", is more universal, but requires gluing or sewing.

My suction cups have a 7.5mm diameter by 3mm long neck, but I suspect most 45mm / 1 3/4" suction cups will work. I got my suction cup from a soap holder at a dollar store (see the picture, maybe your dollar store has the same one). BTW, a little hair gel inside the suction cup helps on porous shower tiles.

Note: Printing upright is best for most feature; a raft and touching-bed supports will help.