The cost seemed reasonable. They have this material on big boards,
so they can cut it, roll it and make it whatever size you want, but here is a sample price list.

1lit Dimensions: Diameter - 12cm / Height - 14.5cm 2,40 €
3lit Dimensions: Diameter - 18cm / Height - 23.5cm 3,60 €
6lit Dimensions: Diameter - 22cm / Height-28cm 4,60 €
10lit Dimensions: Diameter - 25,5 cm / Height-32cm 6,60 €
15lit Dimensions: Diameter - 29cm / Height-34cm 7,90 €
20lit Dimensions: Diameter - 34,5 cm / Height-31, 5cm 9,90 €
30lit Dimensions: Diameter - 41,5 cm / Height-31, 5cm 13,70 €
37lit Dimensions: Diameter - 41,5 cm / Height-37, 5cm 14,90 €
45lit Dimensions: Diameter - 41,5 cm / Height-43cm 16,30 €