Most are made from medical‑ or food‑grade silicone. Some designs combine silicone with other materials such as polypropylene, stainless steel, or other BPA‑free plastics; check the product listing for exact material details.
Common features include slip‑proof silicone skirt seals on collection cups, internal silicone supports to help prevent leaks, flexible silicone tray bottoms that let frozen portions pop out without spilling, and screw‑on lids or caps on bottles designed to provide a leak‑proof seal. Check the product description for specific sealing details.
Common extras include small cleaning brushes, labeling tools (for example an acrylic pen), storage cases or travel caps, and sometimes complimentary wipes. Accessories vary by product, so review the item details for what’s included.