Davisco is an american brand which sells whey protein at a much cheaper price. But it doesn't compromise with quality.
It usually sell unflavoured whey protein in large packs which are then packaged and sold in smaller 2lb bags.
Flavour: Unflavoured whey do not please your tastebuds. It's like unsweetened milk. Use stevia or vanilla extract to add flavour.
Packaging: It comes in sealed polybags which are durable though but couldn't handle wear and tear if travelling through multiple checkpoints.