While I agree with your overall sentiment about < 1% animal products in any particular item we buy or continue to consume and abhor waste, plastics could be argued to be harmful to animals because they're destructive to wildlife. I personally don't see veganism as merely being about directly exploited farm animals but also about the untold numbers of species being driven from their homes or to endangerment or extinction by human selfishness and stupidity, and plastics are way up there...so in purchasing NEW items, it's best to weigh out whether plastics are made from petroleum or a more sustainable material like hemp, if your plastic is being recycled and if you are looking for alternatives to plastic like glass, cloth bags, and metal containers. Obviously old plastics don't pose a real moral problem, even symbolically the way old leather or old fur would, but new plastics do.Agreed. It doesn't substantially benefit the animals to worry about 0.1% animal material in plastics, for instance. It's much better to focus on getting people to eat less (100% animal material) meat. If a person eats one fewer 100 gram hamburger, the resulting decreased consumption of animal material is many thousands of times greater than that resulting from not buying a plastic cup.