Pyramid or "silken" bags are environmentally bad. They are made from plastic or nylon and are not compostable or biodegradable. They aren't microwave safe.
Everything you need to know about plastics in teabags
Is Expensive Tea Worth It? Experts Explain The Difference
Packaging: Where We Are Now & Where We Want To Be – Good & Proper Tea
Next Generation Non-GMO Pyramidal Tea Bag – Fraser Tea
Why Are Pyramid Tea Bags Better Than Loose Leaf Teas/blog
Plastic in Tea Bags: What You Need to Know
Is it safe to use tea bags? - Quora
Refreshing Mint Infusion Buy Eco-friendly Pyramid Biodegradable
ORGANIC LEMONGRASS + BAY LEAF TASTING NOTES: This lemongrass (lemingrass) tea is refreshing and clean with a lemony sweetness. Drink this tea hot or
Teatulia Organic Lemongrass + Bay Leaf Tea Bags (96 Pyramid Tea Bags Total – 6 Canisters x 16 Tea Bags Each) | 100% Compostable | Sustainably Grown In
Frontiers Fate of petroleum-based and plant-based teabags exposed to environmental soil conditions for one year
Some tea bags may shed billions of microplastics per cup
How are Pyramid Tea Bags Better than Regular Tea Bags?
Next Generation Non-GMO Pyramidal Tea Bag – Fraser Tea
Stop Drinking Tea from Teabags! They Have Plastic
The Advantages of Pyramid-Shaped Tea Bags: Enhancing Your Tea Experience – Japanese Green Tea Co.