Custom PrestaShop Module/shipping options

I need a freelancer to add some extra functionality to the already existing shipping system within prestashop. My store only sells bottles of things and each bottle can range from 10ml capacity up to 500ml capacity. Prestashop can either use weight or a max price to determine what shipping options should be available to the customer upon checkout. However, being that I'm selling bottles of things, it isn't possible to set shipping options via weight as it just gets mixed up. So, what I need is something like the following: I have four different bottles sizes that are set up in product attributes, 10ml, 30ml, 50ml and 100ml. Courier 1 = £1 price Courier 2 = £2 price For instance, if customer orders between 1 - 4 10ml bottles, then the only courier available should be courier 1. If a customer orders between 5 - 16 10ml bottles, then only courier 2 will be available. And so on... It should have the ability to add more couriers based on bottles like explained above in the future. I'm currently using the latest version of Presashop. To avoid spam, please put "This is real" in your proposal/bid so I know you're generally intersted. YOU MUST BE A UK CITIZEN. IF YOU'RE NOT A UK CITIZEN THEN YOU MUST 1, SPEAK PERFECT ENGLISH AND 2, BE AVAILABLE DURING MY TIMEZONE TO SKYPE/CHAT.