OXO Glass Smart Seal 16-Piece Airtight Borosilicate Container Set — Stackable, Oven & Freezer Safe

This set brings durable, clear glass storage to everyday meal prep, leftovers and serving. Each piece uses naturally BPA-free borosilicate glass for thermal stability and a silicone-gasket lid with four locking tabs to create a reliable leakproof seal. The assortment of sizes covers single servings to larger portions, and lids are interchangeable across like-sized containers for easy organization.

How does this set handle temperature changes and reheating?

The borosilicate glass resists thermal shock better than standard glass, so containers can move from freezer to a preheated oven or microwave without the same risk of cracking. Lids should be removed before oven use; they are dishwasher-safe but not oven-safe.

• Containers are oven-safe when lids are removed.
• Safe for microwave reheating (remove lids first or vent).
• Freezer-safe for long-term food storage.
• Dishwasher-safe for easy cleanup.

Are the lids really leakproof and easy to use?

Yes — each lid features a silicone gasket and four locking tabs that snap down to compress the seal and prevent leaks and spills. The gasket is removable so you can clean it thoroughly and keep the seal performing over time.

• Four locking tabs compress the silicone gasket for an airtight seal.
• Gasket pops out for deep cleaning to avoid residue build-up.
• Lids for matching sizes are interchangeable for convenience.
• Clear glass lets you identify contents without opening lids.

What sizes are included and how do they store?

The set contains a mix of larger and small containers to suit meal prep, single portions and snacks. Smart Seal containers are designed to nest when empty and stack when filled, saving cabinet and fridge space.

• Includes: one 4 cup (0.9 L), one 3.5 cup (0.8 L), two 1.6 cup (380 mL), one 1 cup (240 mL), three 4 oz (118 mL) containers.
• Comes with eight BPA-free plastic locking lids that fit same-size containers.
• Nestable bodies reduce storage footprint when not in use.
• Stackable with lids on for organized fridge or pantry piles.

How do I clean and maintain the Smart Seal system?

Cleaning is straightforward: containers and lids are dishwasher-safe. Remove the silicone gasket from each lid for a thorough wash and periodic inspections to ensure a long-lasting seal.

• Top-rack dishwasher-safe for lids and glass pieces.
• Silicone gasket is removable for hand washing and drying.
• Inspect gasket occasionally and replace if worn to maintain leakproof performance.
• Glass resists staining and odor retention compared with many plastics.

Who this set is for: home cooks and busy households looking for a reliable glass storage solution that moves easily between freezer, microwave and oven (with lids off). It's also a good fit for anyone who prioritizes BPA-free materials, clear visibility of contents, and compact, stackable storage. The variety of sizes suits meal prep, single-serve lunches, baby food, snacks and leftovers, while the interchangeable lids and nesting design make organization simpler for small kitchens.