How to Clean and Maintain a Silicone-Sealed Straw Cup

Quick answer

Clean your silicone-sealed straw cup by hand with mild soap and warm water, paying special attention to the seal area. Replace the silicone packing when it loses elasticity or shows wear to prevent leaks.

Step-by-step cleaning routine

1. 1. Disassemble the cup completely: Remove the lid, straw, and silicone packing from the cup. Separate all parts to ensure no moisture gets trapped between them. Common mistake: leaving the packing attached to the lid can hide residue.
2. 2. Wash each part by hand: Use warm water and a mild dish soap. Gently scrub the silicone packing with your fingers or a soft sponge. Avoid abrasive brushes that could tear the silicone. Checkpoint: run your finger along the inner edge of the packing to feel for any leftover film.
3. 3. Rinse and air-dry thoroughly: Rinse all parts under running water to remove soap residue. Place them on a drying rack with the packing and straw in a well-ventilated area. Do not reassemble until every part is completely dry. Common mistake: reassembling while damp can encourage mold growth inside the seal.
4. 4. Inspect the packing regularly: Check the silicone packing for cracks, stretching, or loss of flexibility. If it no longer sits flat or feels stiff, replace it with a genuine BONBO replacement packing. Checkpoint: a loose seal is the first sign that the packing needs replacing.

Product facts

• BONBO ストローカップ 200ml シリコーンパッキン 2個入り: Each replacement packing is made of silicone rubber and measures approximately 63 mm in diameter and 4 mm in height, weighing about 2 g. The precise fit ensures a reliable seal; if the packing becomes misshapen or stretched, replacing it restores the cup's leak resistance.