Serum bottles are ideal for long and short term sample storage, lyophilization and vaccine/injectable. drug Containers these molded bottles have excellent wall strength and chemical tolerance. which are important for storage applications. Bottles are manufactured from Wheaton 400 borosilicate molded glass that conforms to USP Type I requirements. Bottles are package in shrink-wrapped partitioned modules with the exception of 2 ml size, which has no partition.