ALL NATURAL, ENVIRONMENTALLY FRIENDLY AND SUSTAINABLE. STRONG, ELEGANT AND LEAK RESISTANT. HANDCRAFTED FROM BAMBOO SHEATH, MORE SANITARY THAN WOOD OR PLASTIC. NO HARSH CHEMICALS OR BLEACHES USED. REQUIRES LITTLE ENERGY TO MAKE AND IS 100 PERCENT BIODEGRADABLE. NATURALLY ANTI-MICROBIAL, BOTH REUSABLE OR DISPOSABLE. MUST WASH BY HAND. 4" DIAMETER