Here is a bucket clip for attaching tubing to a five gallon bucket. It clips on to the side side of the bucket and the tubing pushes tightly through the hole. I use it when siphoning water out of my aquarium when doing water changes so that the end of the siphon doesn't come out of the bucket and make a mess on the floor. There is an indentation for you to put your thumb and hold it in place when removing the tubing.
I find it very useful for aquarium maintenance, but I'd love to see what other uses people might have for it too.
I printed it sideways (hole axis parallel to build plate so as to give more strength and flexibility to the clip arms which act like spring to snap it onto the bucket. I printed it with ABS.
You can also check out my other handy aquarium related models.
Glass Canopy Aquarium Chute:
https://www.printables.com/model/760099-aquarium-chute-for-glass-canopy
Copepod Housing:
https://www.printables.com/model/702715-copepod-housing
I designed this using Solidworks.
The author marked this model as their own original creation.