Because these are intended as food containers, there are no returns. I'm sure you can appreciate that. Imagine buying a bottle someone else returned. Ya, let's just go with "no returns." Maybe rinse before using lol?
The bottles are dishwasher safe but it will tweak the label. You can peel back the label and flatten out the tweaks as you re-stick it, but prolly better and faster to just suck it up and wash the damn bottle. Caps can go in the dishwasher.