The eco-friendly 4 oz. blue glass square bottle & cork features vibrant crimson color and a distinctive look. Made of recycled glass and includes a particle cork. This glass bottle is manufactured by methods that allow for slight variations in size and volume. Bottle openings may vary by 1/8". This item is painted and baked with lead free paint. Variations in color may exist. Not dishwasher safe. Particle corks included are porous and for decorative use only. Corks are not recommended for use with liquids.