Ortlieb Velo-shopper

"The Velo-Shopper from Ortlieb is the ideal companion for anyone who likes to travel by bike and doesn't want to compromise on comfort and functionality. With a generous volume of 19 liters, this unisex bike bag offers enough space for your shopping or personal items. The waterproof, abrasion-resistant nylon fabric ensures that the contents stay dry even in bad weather, while the magnetic snap-lock lid makes it easy to open and close with just one hand."
"The bag is equipped with the tried-and-tested Quick-Lock2.1 system, which ensures secure attachment to the luggage carrier. This allows you to concentrate fully on your ride without having to worry about the stability of the bag. For transportation away from the bike, the Velo-Shopper is equipped with a detachable shoulder strap so that it can be carried comfortably over the shoulder. An internal reinforcement provides additional protection for your purchases, even when the bag is full."
"Safety instructions must also be observed: u00dcCheck the fastening regularly and tighten the carrying straps to avoid the risk of injury. Remember to retighten the screws after certain kilometers to prevent loosening due to vibrations. Make sure you do not exceed the maximum load of 9 kg to avoid material breakage."