It is shown in a study focusing on the use laundry detergents that are eco-designed provide no environmental gain (Chapotot et al., 2011). However, in this work aforementioned, there is no influence consideration on the environmental assessment of laundry detergent packaging themselves, nor the effects of logistical impact is expected to be also reduced by eco-designed solutions (insurance gain weight to transport). Here we study how this behavior influences the environmental impact of the packaging itself and of the complete product (washing, packaging and logistic). Taking into account the container-content system of laundry detergent, we show that neglecting the real behavior of users induces the risk of underachievement design. The eco-design of packaging cannot be reduced to a material choice or mass limitation of this package. It is in the way it performs on the effective consumption of the material contained that it has its greatest usefulness and influence.