I have a pressure washer that is woefully underutilised once the patio gets its annual clean up. Thinking I could rig up a jig to hold all the bottles in a nicely presented row for blasting.
Nah, sticking with the bin.
Don’t take my word as gospel, but the water temperature can warp some plastics. I put a load of acrylics from work in my dad’s dishwasher years ago, and most of them came out warped ‘cos the temp was too hot. It would depend on the material of the bottle I suppose?