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Most listings show acrylic or other plastics as the material; a small number of items are listed as glass.
Capacities vary widely, typically from about 5 ounces up to the low 20s ounces — example listings span roughly 5 oz to 23 oz.
Many listings advertise these items as shatterproof or break-resistant and market them for durable, outdoor-friendly use.
Common set sizes are packs of 4 or 8; some items are also sold individually.
Listed heights range from about 3 inches up to approximately 8.5 inches.
