Clear plastic bags are most commonly made from polyethylene (including LDPE) and polypropylene. Product descriptions and listings will usually specify polyethylene/LDPE or polypropylene as the bag material.
Common closure types include double-seal or double-zip locks and slide/slider zippers. Listings often describe these as double-seal/double-lock closures or slide-zip/slider closures.
Clear bags let you see the contents at a glance, and some portion bags include printed volume markings for measuring servings. Product descriptions frequently highlight transparency and printed volume marks for portion control.
Favor or cello bags are described as clear and presentable for treats. One common configuration is a 20-count pack that includes metal twist-ties to secure candy and small treats.
Available formats include multi-count variety packs and refillable/dispenser-style kits. One variety pack example lists 355 bags, and some reviewer summaries reference a refillable or dispenser format for multi-size kits.