Walmart insulin is not lispro/glargine, it is R/N, which is a different formulation. Treatment of type 1 with R/N is associated with significantly higher mortality, A1C, and complication risk, and, of course, much lower quality of life.

Bear in mind: when you mis-dose insulin, your blood turns into acid.

No endocrinologist would ever recommend treatment with older insulins over the new stuff. The only way it happens is because of cost.