Most OEM delays are artwork delays in disguise. The four properties every usable branding file has, the barcode rules retailers actually enforce, and the trademark housekeeping to do before the files fly.
What the fifteen days from artwork to approved sample are made of, why the re-sample is the number that decides your container date, and what to send on day zero so the clock starts immediately.
Private label on bamboo is not one service with one price. Laser engraving, printed marks and custom packaging each carry different setup costs, different minimums and different failure modes. Where the money actually goes, and how to stage the spend.