Every time my family buys one of those powder detergents, which is quite popular in Japan, it comes with built-in spoon, which helps gauge the amount of power you need for a given size of water. Producing another new spoon as they produce another unit of detergent is obviously not eco-friendly.
Maybe those manufacturers (notably, Kao, Lion, P&G, Uniliver, among others) should learn from ice cream makers and exclude the spoon from the packaging.
A few days ago I happened to find this 7-11 original detergent that come without gauge spoon, they claim it is eco conscious. I bought one obviously.