The present invention is based, at least in part, on the identification of a pharmaceutical container formed, at least in part, of a glass composition which exhibits a reduced propensity to delaminate, i.e., a reduced propensity to shed glass particulates. As a result, the presently claimed containers are particularly suited for storage of pharmaceutical compositions and, specifically, a pharmaceutical solution comprising a pharmaceutically active ingredient, for example, HUMALOG (insulin lispro), HUMALOG MIX 75-25 (insulin lispro), HUMALOG MIX 50-50 (insulin lispro), HUMILIN 70-30 (insulin), HUMILIN N (insulin), HUMULIN R (insulin) or GEMZAR (gemcitabine).