Lost or misplaced drink bottle parts? Our replacement straw top twin pack can help. Now sold separately to help minimise unnecessary spare parts and lessen our environmental impact, our straw tops are designed especially to fit the 450ml and 600ml tritan drink bottle. Made from silicone, the new spill proof, easy drink straw has a simple and easier sucking action for all day H2O on the go. straw bases (450ml and 600ml) and straw connector for the tritan drink bottle now sold separately BPA, Phthalates and PVC-free.