I was walking my GF's dog this morning, picking up his poo with the little doggie bags that are on the leash, when I remembered what my GF said about the special little (somewhat costly) bags a time ago when I asked why plastic shopping bags wouldn't do for free?
"The shopping bags rip/split too easy. Would you want to grab some poo and come to find a bag had a small hole in it? These bags are much tougher."
I then started to ask myself:
A) What do they weigh? (They don't register on my digital scale)
B) Are they tough enough? (Definitely, very tough to poke a hole w/ my finger)
C) Would I get annoyed tying and untying the bags vs. sealing and resealing ziplock bags? (To be determined)
Anyway, on a long wknd hike I carry the following quart freezer ziplock bags:
(Freezer bag cooking)
Digital Camera (carried in pants pocket)
Toiletries/1st Aid kit
So the bags don't register on my kit, but let's call them 1g for one bag to be conservative. A 1qt Freezer Bag weighs 5g. By replacing them with doggie bags, potentially I could save 9 x 5g = 45g, then add back 1g per bag and you net 36g/1. 27oz.
I think it won't be that big a deal to tie a baggie here or there, but we'll see. And I genuinely think these bags are much tougher than my ziplock bags, especially at the seems, again we'll see.
They are good sized. Here is one laid out on my thigh: