soda-lime glass container glass Container glass is less water soluble than flat glass. Container glass is a soda-lime glass which is composed of approximately 74% silicon dioxide (silica), 13% sodium oxide, 10.5% calcium oxide, 1.3% aluminium oxide, 0.3% potassium oxide, 0.2% sulphur trioxide, 0.2% magnesium oxide, 0.04% iron III oxide, and 0.01% titanum dioxide. ORCID:0000-0002-4366-3088