You buy DMSO from us exclusively in amber glass bottles. There is a reason for this: dimethyl sulfoxide is a polar solvent that can dissolve various plastics and extract substances from them. There are only a few plastics that are compatible with DMSO. These include polyethylene (PE for short), polypropylene (PP for short), polyoxymethylene (POM for short) and rubber/caoutchouc. Our spray attachments are also made of HDPE, a special variant of polyethylene, and POM. The pipettes have an HDPE cap with a rubber cap. All of those plastics are compatible with DMSO and are therefore suitable as sealing material. In general, you can also purchase empty replacement bottles and accessories from us.