If you have a huge collection of unused toys with no suction cup base, then this might be worth a look. However, it's lack of smaller sizes and the fact that a drop of water causes this thing to slide all over reation.

The Sex in the Shower Suction Cup is, as a whole, great. I just wish it didn't slide so easily when wet. I do love how you can make any flared-base toy into a suction-cup toy!

The idea behind this double sided suction cup is pure genius; turn any dildo with a flat flared base into a suction cup dildo! Unfortunately in practice, it's less than stellar. It does actually hold dildos up, and pretty well at that. But it slides and if you have tiles, it'll slide over a break in tiles and break the suction. Otherwise any smooth, high gloss surface is your playground.