[blueseltzer]

Thanks for the tip re not coming up too high. I cant get the skirts from evebra to sit right with the 9.5 inch round cups from ebay that arrived yesterday so that currently isnt an issue. the silicone will stretch around the edge of the cup, but the bottom of the skirts won’t flare right. to make it work i would have to mold my own soft silicone skirts, which i am thinking of doing. 

and yeah! i baked my cups and stretched em. i thought of stretching em myself, but I’m sure others have tried before!

i tried cooking the noogleberry butt cups i ordered and was never gonna use first to get a method down. I looked up the softening temp of clear plastic online and guessed at a target temp of stretchability at 220F. 

key is to not go too high and pull em as soon as they hit softening. I noticed small bubbles forming in the rim and pulled em at that point to stretch. I did four experiments and wrote em up as i did em (I’m a nerd). My best result actually was experiment 1 below:

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noog butt  cup

6 1/2 wide by 7 3/16th tall starting measurement
procedure:

1. unscrew and remove locking air valve from noog cup
   
2. place cup open side up in kitchen oven resting on aluminum foil on middle rack
   
3. preheat oven to 200f, start bake and start stopwatch
   
4. stopwatch at 5:36 temp on oven reads 200 turn off and open oven
   
5. wearing oven mitts gently widen mouth of cup while still in oven just sligtly. notice edges of cup have slight bubbling under surface. hold cup wider with mitts and remove from oven 
   
6. hold wide for approx 3 minutes while plastic cools
   
7. notice slight edge deformity occurring. press deformity back into place with metal spoon handle. 
   
8. allow plastic to cool to room temp approx 20 min on timer from start of experiment
   

results: slight edge deformity and bubbling noted. threads still work for screwing in airlock valve. 

width: 6 and 7/8 inch (+ 3/8 inch)
height: 6 and 3/4 inch (- 7/16 inch)
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I have an infrared handheld thermometer so i started using that to measure the cup temp directly for experiments 2,3,4. I think the softening temp is about 250F measured at the surface of the cup itself. 

My oven heated over the set temp of 200F on experiment 1 because that’s how my oven works apparently. it overshoots and then cools down. I don’t know by how much though because I didn’t have my infrared thermometer in hand for experiment 1. 

On experiment 2 for some reason my oven heated slower. Maybe because it had just been used. So it took longer to come to the stretching temp. As a result the noog cup threads deformed because they were just below the stretching temp for like 10 minutes. where the valve screws in is deformed and I had to glue the valve in to make it seal. 

I then stretched the Evebra cups using the same procedure and they stretched when the surface temp of the cups reached about 250F. So if i stretch cups again. I will set the oven temp to 250F, let it stabilize and then put the cup in to let the cup come to temp, measure the cup temp, pull and stretch. 250F may be a bit low. more experimentation is needed!

When you stretch a cup the axis you are not stretching gets smaller. so when i made my Evebra cups wider they got a little shorter top to bottom. To prevent this i was considering putting a block of wood top bottom to hold em at a height, but didn’t get that far yet. That may require a higher temp though which increases deformity risk. I may try this for science on my new ebay round cups that i cant use till i figure out how to mold skirts from silicone. 

Now I’m using stretched Evebra cups for my width and have dropped my vac pressure to the recommended -20mm/Hg. i think this avoids the cup pressing hard down into the skirt and cutting off pressure outside the cup. This way the skirts spread wide and spread the vac effect wide too on my wider and taller boobs. We’ll see. If i could make a wider taller cup and wider taller skirts I would totally use em, but i don’t know if i am THAT crafty.