Not being the owner of Dart I can only say that the Dart family does nothing without very good reason. I do know that the purchase will give Dart Corp products across the entire single use product span, including paper cups, which Dart does not make.
The Red Solo cup is an icon, Dart makes one very similar, as does every other food service manafacturer, Hefty branded ones come in camo around here.
I too like the slide open Solo lid, Dart has a no leak one made of 2 pieces, these types of lid are the most expensive because of all the added processes.
Intereresting to note that Solo outsourced the majority of its design, Solo having 37 in its engineering department, Dart has 300+.
Has anyone here done work for Solo?
Thanks for the replies!