Currently, all of our Starter Kits come with plastic bottles. The kits are pre-kitted at our warehouse, so unfortunately it's not possible to make substitutions. We hope to have Starter Kits with all glass bottles some day, but we are still designing the glass foamer and the glass laundry bottles. If you'd like to get the glass spray bottles, you'll need to order them à la carte or get the Glass Bottle Kit.
If you do decide to get one of our Starter Kits with plastic bottles, the bottles are made of #1 plastic known as PETE or PET and are phthalate-free and BPA-free. They are made to last and are refillable over and over again.