Amazon (Yesland, Zopeal, uxcell) for smaller, ready-to-ship quantities, specialized packaging suppliers like Allstate Can, Specialty Bottle, and GTS Packaging Solutions for more custom or bulk orders, and international platforms like Alibaba for large-scale manufacturing with diverse features like food-grade coatings and embossing. Key suppliers range from wholesale providers to manufacturers offering custom branding for tea, coffee, cosmetics, and spices. 

When choosing, consider factors like food-grade certification, internal coatings, seam construction (double-rolled/welded for moisture), and customization needs (print, embossing) for your specific product.