add to cart - multiple products at once On my commerce site, I would like to use exact functionality like both ubercart cart links or ubercart kits have - to add multiple different products to cart at once (one click on button or link, no quantity). 
Requirement is: products inside cart should behave as single products, with quantity enabled. I do not need discounts.

modules I tried:


commerce product bundle - adds all products as one product, you can only change quantity
commerce bundle - separate products but quantity fields disabled.


Rules links look promising but I am not so sure how it would work with many kits. Do anybody have a solution for this? Thank you.

User case: Create various product kits (as content types) with add to cart button. After adding to cart, products behave like normal simple products. (Ubercart has this funtctionality - while creating a product kit, you can check wether you want the products to behave in cart like a kit(a bundle) or as a separate products.)
Commerce Add to Cart Extras


  This module provides alternative ways of adding products to cart.
  
  The initial version provides a views field handler ("Commerce Product:
  Quantity input field") that relies on the Views Form API (a part of
  Views 3 since RC1) to output a quantity textfield that turns the view
  into an add to cart form. The default quantity can be configured, and
  only products with a quantity larger than 0 are added to the cart.