Honestly, there’s a lot that goes into it, logistics costs, packaging costs, average usage, apparent value, etc. are all taken into account. The manufacturing and distribution cost of a 100ml bottle isn’t really much less than a 250ml one. If someone see’s a 100ml and 250ml sitting next to each other, with the actual price difference, they are vastly more likely to buy the 250ml… even if they’re only going to use 75ml. It seems like a “better deal” and thoughts of “what if I need it for something else? I’m not driving all the way back here for it!”. Combine that with “there’s a finite amount of shelf space” and the grocer isn’t going to want to stock both if 90% of the time people just buy the 250ml.
Honestly, there’s a lot that goes into it, logistics costs, packaging costs, average usage, apparent value, etc. are all taken into account. The manufacturing and distribution cost of a 100ml bottle isn’t really much less than a 250ml one. If someone see’s a 100ml and 250ml sitting next to each other, with the actual price difference, they are vastly more likely to buy the 250ml… even if they’re only going to use 75ml. It seems like a “better deal” and thoughts of “what if I need it for something else? I’m not driving all the way back here for it!”. Combine that with “there’s a finite amount of shelf space” and the grocer isn’t going to want to stock both if 90% of the time people just buy the 250ml.