Need help for LunchBox

Grasshopper
1

i would like to make the distance at the bottom with a small distance and then getting wider when its on the top how we can do this. Could anyone help me pls . thank you in advance

Ask
Ask1270×787 338 KB
model.gh (4.1 KB)
model.3dm (1.9 MB)

2

Something like this?

Canvas%20at%2023%3B35%3B29
Canvas%20at%2023%3B35%3B291592×627 347 KB
model_re_v1.gh (302.6 KB)

3

thank you very much for your help Kim