Oh, I totally get that frustration! There's nothing more annoying than carefully lining your kitchen trash can, only to have the bag collapse and disappear into the depths when you toss the first item. It defeats the whole purpose and creates a messy hassle.
To answer your question directly: yes, a well-designed urban trash bin should absolutely have an effective bag retention system. It's a feature that separates a decent bin from a great one. The best systems typically involve a subtle but sturdy lip or ridge around the inner top rim of the can. This ridge gives the elastic or drawstring of your standard kitchen bag something to grip onto and hook over.
When you pull the bag's edges over this lip and secure it, it creates tension that holds the liner firmly in place. This prevents the bag from slipping down, even when you're disposing of heavier items. Some advanced models might include built-in clips or a more pronounced, textured channel for an even stronger hold.
It’s a simple engineering solution that makes daily life significantly cleaner and more convenient. So, if your current bin lacks this, it might be time for an upgrade. Look for "secure bag retention" or "anti-slip rim" in the product descriptions—your future self will thank you every time you take out the trash without a struggle.