For DIY plastic recycling, HDPE is the go-to material! But how do you know if plastic is HDPE? 🧐 First, check the resin code - if it’s a number 2 in the triangle, you’re good to go. But sadly, not all manufacturers label their plastics. Luckily, most bottle tops are Polyethylene or Polypropylene. So to tell the difference, drop it in water - if it floats, it’s one of the two. Then, do a smash test. If it cracks, it’s Polypropylene, and if it squishes and dents, congrats, you’ve got some sweet,