Microwave-safe pan

I'm looking for a way to distribute heat more evenly, especially when defrosting, or when softening butter.

• Joseph Joseph M-Cuisine Microwave 4-Piece Stackable Cooking Set, 2 liter cooking pot, steamer, griddle and lid
• Joseph Joseph M-Cuisine Microwave Rice Cooker [▶]
• https://www.amazon.com/Nordic-Ware-68500-Multi-Boiler-Size/dp/B06XSNLBZ2
• https://www.amazon.com/gp/product/B07XM5C7PG

Sistema's Microwave line

• Noodle Bowl
• steamer, large (3.2 L, 9.5" wide)
• steamer, medium (2.4 L, 9.5" wide) [▶]

Advice

• https://urbanquarter.com/english/myth-or-fact-is-stoneware-ceramics-dinnerware-microwavable-or-oven-safe/ "When using in a microwave, avoid extreme temperature changes. Do not transfer stoneware directly from the fridge to the microwave or oven. Use oven mitts when handling hot stoneware to avoid burns."
• "Most modern glass containers are microwave safe but some may not be. You can test by pouring a cup of water into a measuring cup and putting it next to your empty glass bowl in the microwave. Microwave for a minute. If your glass bowl gets warm, it’s not microwave-safe ... it should still feel basically room temperature."
• As always, it's important to understand THERMAL SHOCK here.