Ritual Washing Cup

…if you're still curious, https://en.wikipedia.org/wiki/Handwashing_in_Judaism is a good place to start.

Printing Instructions

• You want this to hold water and not leak, so may need to be generous in top, bottom and side thickness.  I set all of these to 2 mm
   
• You don't need supports, but the bottom of the letters will be cleaner if you put supports there.  How much it matters depends on the quality of your printer and your choice of material

See Also

If you're curious about what an Exshtender™ is, https://www.shapeways.com/product/GBT4GCGWE/exshtender-v5-20 has a good description, including a link to a video of how to use an early version. https://www.treatstock.com/3d-printable-models/3659837-exshtender-v539 tends to be cheaper.