That's a great question! Finding the right liner for a rectangular kitchen or office bin can make cleanup so much easier. From my experience, the best liner is one that fits snugly. A bag that's too small will slip down, and one that's too large is wasteful and messy.
First, measure your bin. Check the height, width, and length. Most liner boxes list their dimensions. Look for bags marketed for "rectangular" or "kitchen" bins. A good fit prevents gaps at the corners where trash can get trapped.
Material matters. For general waste, a standard 0.9-mil thickness might work. But for heavier or wetter kitchen waste, I always recommend heavy-duty or contractor bags (2-mil or more). They resist tears and leaks, which is crucial for a rectangular bin you might drag to the curb.
Features to consider: Look for leak-proof technology or scented options if you dispose of food scraps. Drawstring ties are a lifesaver for easy closing and carrying. Ultimately, the "best" liner balances a perfect fit, strong material, and features that match your specific waste needs. It saves you from messy cleanups in the long run!