Costco Souper Cubes Tested: Side-by-Side Comparison of the Viral Freezer Trays
By Elena Rostova
Portion control molds depend entirely on measurement reliability. If a recipe calls for two cups of frozen bone broth and your frozen block actually yields one and a half, cooking times and seasoning balances fail.
We filled both genuine Souper Cubes and warehouse duplicate models with room-temperature water at 20°C using laboratory-grade graduated cylinders, marking the meniscus against the molded fill lines.
| Product Model | Target Volume (per well) | Actual Measured Capacity | Rim Reinforcement | Typical Retail Bundle |
|---|---|---|---|---|
| Original Souper Cubes (1-Cup) | 8.0 oz (236 ml) | 8.1 oz (fill line accurate) | Internal Stainless Steel Wire | $34.99, $37.99 (2-Pack Online) |
| Costco Warehouse Branded Pack | 8.0 oz (236 ml) | 8.0 oz (fill line accurate) | Internal Stainless Steel Wire | $19.99, $24.99 (In-Club Deal) |
| Third-Party Knockoff Tray | 8.0 oz (236 ml) | 7.1 oz (undermarked by ~11%) | None (100% Soft Silicone) | $14.99, $17.99 (Discount Outlets) |
Souper Cubes molds provide distinct interior etchings at both the 1/2-cup and 1-cup thresholds, alongside 125ml and 250ml notations. Because water expands by approximately 9% upon freezing, the engineers calibrated the top fill line to sit comfortably below the tray lip. When frozen, the food brick levels off flush with the top without bonding to the lid. Cheaper imitation molds frequently place fill lines too close to the lid line, causing frozen blocks to adhere to the underside of the plastic cover.
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
