Last year I took about 6 litres of old engine oil to the local tip in various 1 litre and 2 litre plastic bottles. One of which was labelled gear oil.
“Sorry but we only take engine oil here” were the words of wisdom delivered by the young oik attending to me.
By opening the lids to demonstrate they all contained the same colour liquid, I eventually convinced him it actually was engine oil.
Next time I shall use 2 litre plastic milk bottles. Just for fun.
What a world we live in.