Look for containers made from BPA‑free, microwave‑safe plastics like Tritan or silicone‑coated materials. An airtight seal or secure latch helps prevent spills, while built‑in vents allow splatter‑free heating without removing the lid. Stackability and clear walls also add convenience for storage and quick food identification.

Rubbermaid Brilliance offers crystal‑clear, stain‑resistant Tritan construction with built‑in vented lids for microwave use, whereas Ello’s Lunch Stack provides multiple sizes, a removable divider, and includes stainless‑steel utensils. Both are BPA‑free and dishwasher safe, but Rubbermaid’s design focuses on a sleek, leak‑proof seal, while Ello emphasizes versatility with extra accessories.

Bento boxes like MISS BIG and Bentgo Prep give you separate sections for proteins, veggies, and carbs, which helps with portion control and keeps foods from mixing. They often include extra features such as built‑in forks or silicone protective boots, adding durability and convenience. If you regularly meal‑prep balanced meals, the added organization can justify the higher price.

Sets that include a range of sizes and accessories, such as the 20‑piece Bentgo Prep or the 10‑piece Ello meal‑prep collection, deliver the most bang for your buck. They combine durability, BPA‑free safety, and microwave, freezer, and dishwasher compatibility in one package, reducing the need to buy individual containers later.

Only containers with vented lids—like Rubbermaid Brilliance and Sistema—allow you to microwave with the lid on, which reduces splatter. For non‑vented options, such as many Ello and Bentgo models, you should remove the lid or open the vent to avoid pressure buildup and ensure even heating.

Stackable designs save space and keep your fridge or pantry tidy, especially when you have multiple meals prepared for the week. Rubbermaid Brilliance and Bentgo containers feature uniform shapes that nest securely, while some bento boxes are bulkier but still fit together if you plan the layout carefully.

High‑quality plastics like Tritan are lightweight, shatter‑resistant, and maintain clarity over time, whereas silicone‑coated or silicone‑booted containers (found in some Ello sets) add an extra layer of protection against cracks and scratches. Silicone can also improve grip and heat resistance, but pure plastic often offers a clearer view of contents.

Stain‑ and odor‑resistant materials help keep your containers looking new and prevent lingering food smells, which is valuable if you rotate meals frequently. While basic BPA‑free plastics work fine, the added resistance can extend the life of the containers and reduce the need for intensive cleaning, making the higher price a worthwhile investment for heavy users.