Will Travel for Gravel Lightweight and indestructible, we keep ours in the freezer so it's always ready for a super chilled at-home pour. Nucleation imprint keeps that head firm and frothy BPC (BIOPOLYCARBONATE) construction a.k.a Reusable and sustainably developed - Recycle this pint pot, and it will be turned into pellets and made into something new and reusable!