This lower profile 3-legged stand fits nicely in a small bag and can hold a 1lb propane tank very securely.

The legs require some force to fit them inside the ring. Wiggling them makes the process way easier and could possibly avoid them being cracked.

If you print the 3ml file you'll find that I've already increased the infill on one part of the legs to 100% to have them endure large forces exerted on them.