I would say overall, quite easy to navigate. What ...

I would say overall, quite easy to navigate. What I like to suggest are:
1). Provide more option to choose, particularly size wise. Quite a number of options is only 100 ml, then jump to 1 litre......how about: 500 ml, even 250 ml?
2). Provide option for though slower, but cheaper way of delivery, e.g, via postal service. Lots of order doesn't need a FedEx speedy service. Sometime one only need to order one or two items, and one need to pay about the same price for a courier service, meaning, cost of good is almost doubled! Doesn't make too much sense to buy, then one would try to wait.....then u lose an order. Make sense?