I solved the problem with gas stations in the beginning, as they refused to simply fill containers and only sold pre-mixed fuel (only God knows the oil-gasoline ratio and the quality of the oil). It is of good quality as a material and the gasoline does not evaporate, which was a problem I had with transparent and semi-transparent containers. Gas stations are obligated to fill it up because it is specialized for fuel and it keeps the gasoline in excellent storage condition for later use after a long period of time. The price when I purchased it (five euros) was ridiculous for the 5 liters and its quality.