How do you handle wafer pieces to submerge them in HF acid and other cleaning baths?

You use tweezers, but HF will eat away any metal ones, and I would not trust much else other than HDPE plastic that can withstand it. However, I did not find accesible (cheap) ones, so I decided to make them, it's funnier and cheaper.

Too thick stock coupled to a short endmill marred the results a bit, but it proves the point, once I get thinner HDPE sheet, I'll make some more.

(and nope, my 3D printer is not working properly)