This just had a fairly successful field test (summer conditions).
This is a 10cm Imusa mug w/ chopped handle. The lid is made from pressed tooling foil (ie tin cookie sheet) with an aluminum tape handle. This is a simple alternative to a fiberglass or kevlar wick wrap. (I once had a flare up melt a plastic lid, so I'm reluctant to use a silicone ring.)
The 'ear flaps' add about .06oz. The full piece of carbon felt weighs .24oz.
The flaps are about 1.5" x 2". The fiberglass wick I have weighs .32oz/yd. .06oz of it would give less than 2 turns around the mug, so this is definitely lighter.
You obviously have to keep the lid on to use the flaps to pick up the pot, which means you're pouring with the lid on. To accommodate this I trimmed the inner lip of the lid over a 30d arc. The result was an acceptable pour and didn't noticeably compromise the rigidity of the lid.
Out of 8 boils, I felt the need to put the pot down mid-pour once. I think some steam might have gotten in to the felt heating it up.
Possible remedies for that:
– leave the inner lip of the lid longer near the flaps
– line the flaps with foil
– double layer the flaps
Felt cut out

Lid with 'ear flaps'

Trimmed lip

Pouring




