Üllo filters are crafted from a sophisticated, food-grade macroporous acrylic polymer, a material commonly used in industrial food processing and pharmaceutical applications. This polymer works by capturing free sulphites in wine through a process called covalent attachment. Üllo filters are completely non-toxic, vegan, and gluten-free, ensuring safe and effective wine purification.

Üllo’s Selective Sulphite™ Capture technology is at the heart of its filtration system. When activated, the filter targets and binds free sulphites in wine through covalent attachment, selectively removing them while leaving the wine’s natural flavours and aromas untouched. No additional substances are introduced during this process, making it a safe and reliable way to purify wine.

Each Full Bottle Selective Sulphite™ Filter is designed to purify one 750mL bottle of wine, while the Single Glass Selective Sulphite™ Filter works for a single glass (5oz/150mL). The unique chemistry of the filter binds sulphites irreversibly, so once the filter is saturated, it needs to be replaced for effective purification.

A partially used filter can be reused the next day on the same bottle of wine if stored properly. To maintain its reactivity, rinse the filter and refrigerate it between uses. For individual glasses, reusing the filter for a second night is possible, but effectiveness may slightly diminish.

Filtered wine may appear slightly cloudy due to microbubbles created during the nano-filtration process, which typically dissipate quickly. If sediment appears at the bottom of your glass, it could indicate a broken filter. Although the filter material is non-toxic, we recommend discontinuing use and contacting support@ullowine.com for a replacement.

While rare, filters may occasionally be damaged during shipping or while opening the packaging. If this happens, Üllo will replace any broken, defective, or damaged filters free of charge. Please contact support@ullowine.com to request a replacement.

When stored properly, Üllo filters do not degrade over time. However, once a filter is wetted, it will gradually lose its activity and should be used promptly for the best results.

To maintain their effectiveness, store filters in a cool, dry place away from heat and air exposure. Avoid opening the filter packaging until you are ready to use it.

When stored properly, Üllo filters do not degrade over time. However, once a filter is wetted, it will gradually lose its activity and should be used promptly for the best results.

Yes, Üllo filters are made entirely from food-grade safe materials. They are non-toxic, vegan, and gluten-free, ensuring a safe and enjoyable wine purification experience.