Most people call them ice balls or ice spheres. You’ll also see terms like round ice cubes and, for smaller shapes, pebble or nugget ice. These shapes are popular for cocktails, whiskey, and coffee because larger spheres can melt more slowly than many small cubes, which may help reduce dilution depending on your drink and timing.

• Ice ball/sphere: typically 1.8–2.7 inches in diameter
• Mini rounds/pebbles: small, quick-chilling pieces for tall glasses
• Round molds: single-cavity or multi-cavity trays with or without lids

On Walmart.com, you’ll find a range of circle ice cube trays and sphere molds in different sizes to match various glassware and preferences.

1. Rinse and assemble: Rinse your circle ice cube tray, align the top and bottom, and ensure any vents face up.
2. Stabilize: Set the mold on a flat plate or baking sheet for easy transfer.
3. Fill slowly: Pour water through the fill hole (a small funnel helps) to the indicated line, leaving a little headspace.
4. Release air: Gently press the lid to “burp” trapped air so spheres form evenly.
5. Freeze flat: Place it level in the freezer until solid; many people leave it overnight.
6. Unmold carefully: Let the mold sit a minute or run the exterior under cool water, then peel back the silicone.

Filtered or previously boiled-and-cooled water can help with clarity. Always follow the care notes on the product page; results can vary by freezer.

• Use the fill line: Stop at or slightly below it to avoid leaks between the two halves.
• Go slow: A small funnel or squeeze bottle helps control the pour and reduce bubbles.
• Burp the mold: Lightly press the lid so air escapes through the vent holes.
• Tap gently: A couple of taps on the counter can lift hidden bubbles for cleaner spheres.
• Keep it level: Place the tray on a flat plate or sheet pan before moving it to the freezer.
• Mind the water temp: Cool or room‑temp water is generally suitable; very hot water may not suit all lids—check the product care notes.

Lidded, stackable circle ice cube trays on Walmart.com can help minimize spills while freezing.

1. Wash before first use: Clean with warm, soapy water and a soft sponge.
2. After each batch: Hand wash or, if the product page states it’s dishwasher‑safe, place on the top rack.
3. Deodorize gently: For lingering odors, soak silicone in warm water with a spoonful of baking soda for 15–30 minutes, then rinse.
4. Avoid abrasives: Skip harsh scrubbers and sharp tools that can damage the mold.
5. Dry fully: Let molds air‑dry completely to help prevent freezer odors; store with lids slightly ajar to allow airflow.

Keeping molds away from strong‑smelling foods in the freezer can help. Always refer to the care guidance on the Walmart product page for your specific tray.

The right size depends on your glassware, drink, and freezer space. Here’s a quick guide to help you pick a circle ice cube tray that fits your needs:

• Large (about 2.0–2.7 inches): Great for lowball/rocks glasses and spirit‑forward drinks; larger spheres can melt more slowly than many smaller cubes.
• Medium (about 1.0–1.5 inches): Versatile for highballs, iced tea, and everyday use.
• Mini/pebble (about 0.5–0.8 inches): Ideal for water bottles, iced coffee, and quick chilling.

Check the product’s listed diameter and cavity count, ensure the tray fits your freezer level, and consider lids for easy stacking. Product details on Walmart.com typically include size specs to help you match your glassware.