Eco-bricks x 7 (Weston)

I have 7 eco-bricks and 2 in progress. The 7 meet the required weight but are not certificated. I couldn't work out how to do that. I have issues with my hands, so couldn't continue the project. Probs be good for a family project. I take my plastic to Sainsbury's now. These are big eco-bricks 2 litre size, see image relating to product used.