Using a plastic bottle and a suction cup, this can be made to hold shampoo bottles upside down which is useful when they're almost empty. I have many suction cups laying around from those dish sponge holders; every time I buy a new sponge set I get another suction cup.
Fun little hanging bowls and window planters can be made too.
Tools: Scissors and a hole punch
Materials: Plastic bottle and suction cup
Step 1: Cut Bottom Off
Step 2: Punch Hole and Insert Suction Cup
You may have make many holes with the punch to make a hole big enough for the suction cup to fit.
Squeeze in the suction cup.