Such kitchen sink strainer can filter out food,, and that can block up your drains. The rubber washer that sits neatly underneath the Plug creates a seal when fully pressed in to the kitchen sink so that it acts as a plug and allows you to fill up the sink with water.
eBay
Stainless Steel Sink Square Drainer Kitchen Drains Strainers Filter Dregs Deodorant Hose Flume with Overflow Kitchen Accessories
Aliexpress UK
The strainers are corrosion and rust resistant, making them durable and long-lasting. With a front-to-back length of 45 cm and a height of 78mm, these basin drains are easy to install and require no assembly.
eBay
1 Pcs Sink Water Filter Kitchen Drainer Basket Plastic Washing Colander Strainer Food Handle Fruit Draining Bowl Vegetables
Aliexpress UK
No more blocked sink, bath or basin. Simply place this waste plug in the sink plug hole, for example in your bath or shower and this little device will catch dirt and hair and stop it going down the plug hole.
eBay
Floor Drain Anti Odor Smell Sinks Sewer Pipe Silicone Stopper Waste Hair Clogging Water Filter Bathroom Kitchen Toilet Strainers
Aliexpress UK
1/2/4Kitchen Sink Strainer（Random color）. Stem ball with finger rubber seal fitted. Material: Stainless steel (Polished).
eBay
Anti-Clogging Sink Strainer Mesh Bags 200/100PCS Disposable Drain Filter Kitchen Garbage Bag for Food Waste Cleaning Net
Aliexpress UK
Material: Stainless Steel. Due to the different display and different light, the picture may not reflect the actual color of the item.
eBay
1Pc flower Sewer Outfall Strainer Bathroom Sink Filter Anti-blocking Floor Drain Hair Stopper Catcher Kitchen Bathroom Accessori
Aliexpress UK
Prevent clogs and keep your drains clean with this Kitchen Sink Strainer Waste Plug, crafted from premium stainless steel. Kitchen Sink Strainer Waste Plug – Stainless Steel Drain Filter for Basin & Bath.
eBay
Floor Sink Strainer Filter Mesh Disposable Hair Catchers Floor Drain Patch Anti-Clogging Filter Patch Bathroom Accessories
Aliexpress UK
Keep your sink clean and clog-free with this practicalPlastic Kitchen Sink Strainer Set, complete with a convenient holder. Made from durable, high-quality plastic, the strainer is lightweight, rust-free, and easy to clean.
eBay
Dish Drying Rack - Extendable Dish Rack, Large Sink Drying Dish Drainer for Kitchen Counter, Stainless Steel Dish Strainer
Aliexpress UK
eBay
2Set Kitchen Sink Strainer With Handle & Stopper Replacement Drain Basket Stainless Steel Mesh Filter Waste Hole
Aliexpress UK