I have been using a Toothpaste Tube Squeezer of this design, which I purchase from a homeware store many years ago. So a while ago or so, while drying myself with my towel, I knock off it the shelf and broke it...

So my first thought was, I could print a new one.

But first to see if someone else had not already made one, After a thingiverse to search
I found bobc895's Tube Tamer, but when trying to print found a error in the model.

So here is my corrected & resized version, to suit easier to find o ring.

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The o ring I used are for taps in Australia

I bought 'Kinetic brand Standard Spindle O Rings' - 10 Pack - P/N 4920304 for $3.75 from Bunnings in Australia.
The O Rings that fitted best was size 8.0, but the 8.5 size would work too.

I believe they are standard tap parts, I think you could also use POL gas o-rings too.

You could use these for any tubes, not just toothpaste.

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Instructions

Print two pieces of this model, and put "O" Rings over the ends.