I noticed that the big plastic soda bottles I use have quite a nice sound to them so I took out a mic and hit and slapped one of them. The result is the following set of samples which I hereby offer for you all to enjoy!
I'm still working on a Kontakt 3 instrument with these samples, once I have that I will put that up here, too. If you use another sampler and would like to create an instrument for that sampler based on these, contact me if you would like the full set which has a few additional slight variations and a higher sample rate.