Thick-it Purees are ready-to-eat, you just heat and serve.
Thick-it Purees are nutritious and leftovers can be stored in an air-tight, refrigerated container for 5 – 7 days.
Thick-It Nutritionals and Thick-It ingredients (kosher, gluten, allergen info) here:
http://precisionfoods.com/foodservice/bnd_products.cfm?start=1&id=129
http://www.thickitretail.com/ForthePublic/Nutrition.aspx
Thick-It Puree FAQ page:
http://www.thickitretail.com/Products/Purees.aspx