We can not give you a recommendation on that since the same manufacturer may use a different bottle based on different circumstances:
- sometimes they change production when a bottle they normally use is not available
- a lot of the "well-known" but cheaper brands give out licenses to other chemical labs and they fill it in different bottles with the same brand
to name just a few examples. So I am VERY thankful for your question since the only way to get the correct size for the PopCap's / Super Sniffer is by measuring the thread size. Have a closer look at the part at the bottom of this illustration: http://pigload.com/assets/images/SS_size_chart_oct26-22.png
Don't go only about the size of the bottle or the shape, since that does not give any implication about the threads. Double Scorpio poppers are made here in the USA in Texas by gay owners and they only use their bottles so we know that this is always a small cap that fits the double Scorpio brand!
all the best the farmer, stay piggy!